DE102023113688A1 - Solid state battery and vehicle - Google Patents

Abstract

Solid-state battery (1) comprising a cathode (2), an anode (4) and an electrolyte (6), the cathode (2) comprising at least one organic electroactive compound. The organic electroactive compound is a quinone comprising an electron-withdrawing group. The solid-state battery can be used in an energy storage device (4) of a vehicle (11).

Description

TECHNICAL FIELD

The present disclosure generally relates to a solid-state battery. The present disclosure further relates generally to a vehicle including a solid-state battery.

BACKGROUND

The electrification of vehicles has led to strong focus on developing improved energy storage devices to power vehicle powertrains. These energy storage devices require many battery cells to achieve the desired capacity. An energy storage device used to power a vehicle may include one or more battery packs. If the energy storage device comprises a large number of battery packs, these can be connected in series and/or parallel. Each battery pack can generally include a large number of battery modules connected in series and/or parallel. A battery module usually includes several battery cells connected in series and/or parallel, which are partially or completely enclosed by a mechanical structure.

The most commonly used battery cells for vehicle energy storage devices today are lithium-ion battery cells. These lithium-ion battery cells include an anode, a cathode, a liquid electrolyte, and a separator disposed between the anode and the cathode. The separator is configured to contain the electrolyte and prevent a short circuit between the anode and the cathode. The electrolyte used in traditional lithium-ion battery cells is typically ethylene carbonate-based and is a flammable liquid. This can pose a fire hazard, for example in the event of a short circuit. For this reason, various safety components and/or mechanisms typically need to be incorporated into these energy storage devices (as well as into each battery cell), such as power interruption devices of various types.

Efforts to reduce the risk of fire in vehicles have led to increasing interest in the development of solid-state batteries.

Solid-state batteries do not contain a flammable liquid electrolyte, but instead use a substantially non-flammable solid-state electrolyte. Solid-state batteries therefore represent a safer option. By using a solid-state electrolyte, the risk of thermal runaway can also be reduced, allowing for denser cell packing. This would be a significant advantage in the automotive industry given the limited space available in vehicles. Another advantage of solid-state batteries is that they enable the use of lithium metal anodes, for example, and thus a higher energy density.

Nowadays, solid-state batteries typically include an inorganic cathode material. Traditional inorganic cathode materials must be mined and refined at high temperatures and therefore have a significant environmental impact. Furthermore, they can make up a significant portion of the overall cost of the battery. For example, with NMC cathodes, the cathode typically accounts for about 30% of the total cost of the battery. In addition, traditional inorganic cathode materials can have relatively low rate capability, which in turn limits usable charging rates. A higher charging rate is particularly advantageous for heavy commercial vehicles, where downtime due to charging can be expensive for the freight forwarder.

To reduce costs and reduce environmental impact, it has been suggested to use organic materials in electrodes of solid-state batteries. For example, pyrene-4,5,9,10-tetraone (PTO) has been proposed as the cathode material of a solid-state battery. Organic battery materials are known for their fast redox processes and are therefore also interesting from the point of view of opening up the possibility of batteries with high load capabilities. However, the previously known organic materials for solid-state batteries have the disadvantage that they have a quite low cell voltage (about 2 V in the case of PTO) and are therefore probably not suitable for use in energy storage devices of heavy vehicles.

SUMMARY

The object of the present invention is to provide an improved solid-state battery that has the potential to replace conventional lithium-ion batteries (comprising a liquid electrolyte) in vehicles to increase vehicle safety.

The task is solved by the subject matter of the attached independent claim(s).

According to the present disclosure, a solid-state battery is provided. The solid-state battery includes a cathode, an anode and an electrolyte. The cathode comprises at least one organic electroactive compound of the formula I or formula II given below.

R1 to R6 are each independently selected from the group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl), S(C ₁ -C ₃ -alkyl), SO ₂ H, SO ₃ H, SO ₂ NH ₂ , NH ₂ , NH(C ₁ -C ₃ -alkyl), N(C ₁ -C ₃ -alkyl) ₂ , COH, CO ₂ H, CO ₂ (C ₁ -C ₃ alkyl), CONH ₂ , NHCOH, NHCO-C _1-3 alkyl, OCONH-C=CH, CH=CH ₂ and Ph.

L is either a direct bond or a covalent linker moiety with a structure - (CH ₂ ) _s -G ¹ -(CH ₂ ) _t -G ² - or -G ² -(CH ₂ ) _t -G ¹ -(CH ₂ ) _s - where s is between 0 and 6 and t is between 0 and 6.

G ¹ and G ² are each independently selected from the group consisting of a direct bond, O, S, SO ₂ , SO ₃ , O ₃ S, SO ₂ NH, NHSO ₂ , NH, N(C ₁ -C ₆ - alkyl), C(O), CO ₂ , O ₂ C, C(O)NH, NHC(O), OC(O)O, NHC(O)NH, NHC(O)O, OC(O)NH, C=C, CH=CH, Ph and Hy.

In addition, R7 is a polymer chain or selected from the group consisting of terephthalate, naphthoquinone, anthraquinone, catechol, quinone, quinizarin, naphthazarin, indigo, TEMPO, galvinoxyl, phenol, naphthalene diimide, pyrenediimide -, perylenedimide and dibenzothiophenesulfone groups or substituted derivatives thereof.

The fact that the cathode of the solid-state battery according to the disclosure comprises at least one organic electroactive compound of the formula I or the formula II, which is quinoid, leads to an increase in the possible cell voltage. This is due to the covalently bonded oxygen groups on the first ring, which act as an electron-withdrawing group, causing the potential of the hydroquinone group to shift upward. The presence of these electron-withdrawing groups added to the main quinone ring thus allows an increase in the potential of the redox reaction by about 0.5 V compared to an unsubstituted ring or an increase of about 1 V compared to rings with electron-donating groups, e.g. B. in the case of pyrene-4,5,9,10-tetraone (PTO).

Organic molecules can easily break down through addition reactions at positions in the molecules that result in less stability. However, the at least one organic electroactive compound of the formula I or the formula II has a very high stability. This is due to the occupation of all positions on the quinone rings, which severely limits the possibility of addition reactions.

In addition, the at least one organic electroactive compound of formula I or formula II has excellent load capacity.

The cathode may further comprise at least one binder selected from the group consisting of polytetrafluoroethylene, polyvinylidene fluoride, polyethylene oxide, poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, polyacrylates, polyvinylpyrrolidone and carboxymethylcellulose. This results in the at least one organic electroactive compound being sufficiently bound in the cathode. In addition, this can simplify the production of the cathode and also improve its mechanical stability.

The cathode may further comprise at least one conductive additive selected from the group consisting of carbon black, graphite powder, graphene, carbon nanorods and carbon nanotubes. If one or more conductive additives are present, the electrical conductivity in the cathode can be improved.

The at least one organic electroactive compound of formula I or formula II can be present in an amount corresponding to at least 30% by weight of the cathode. The at least one organic electroactive compound of the formula I or the formula II can expediently be present in an amount which corresponds to at least 50% by weight of the cathode. This ensures a high capacity of the cathode, and the cathode capacity increases as the amount of the at least one organic electroactive compound increases.

The anode may comprise lithium metal, sodium metal or an alloy based on lithium and/or sodium. This results in a high energy density of the solid-state battery. In this case, the anode has a higher capacity than, for example, a conventional graphite anode.

According to an alternative, the electrolyte may be an inorganic solid electrolyte. The inorganic electrolyte may comprise an ion-conducting compound selected from a lithium- and/or sodium-containing oxide and/or a lithium- and/or sodium-containing sulfide. An inorganic solid electrolyte offers the advantage of high ionic conductivity, a high Young's modulus and high temperature resistance. However, an inorganic solid electrolyte can sometimes have relatively low stability with respect to electrodes, which in some cases can lead to a relatively high interfacial resistance.

According to a further alternative, the electrolyte can be a solid polymer electrolyte. The solid polymer electrolyte may include poly(ethylene oxide), poly(propylene oxide), poly(acrylonitrile), poly(methyl methacrylate), poly(vinyl chloride), poly(vinylidene fluoride) and/or poly(vinylidene fluoride-hexafluoropropylene). A solid polymer electrolyte offers the advantage of a simplified manufacturing process compared to an inorganic solid electrolyte because it can be processed more easily. In addition, a solid polymer electrolyte has higher elasticity (and plasticity) than an inorganic solid electrolyte, which minimizes the risk of low stability at the interface with the electrodes. However, a solid polymer electrolyte generally has a lower ionic conductivity than an inorganic solid electrolyte, and the load capacity is also generally lower.

According to one embodiment of the solid-state battery according to the disclosure, the cathode comprises at least one organic electroactive compound of the formula I and R1 to R4 are each independently selected from the group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH , SH, CN, O(C _1-3 alkyl), S(C ₁ -C ₃ alkyl) and NH(C ₁ -C ₃ alkyl).

As already mentioned above, R7 is a polymer chain or selected from the group consisting of terephthalate, naphthoquinone, anthraquinone, catechol, quinone, quinizarin, naphthazarin, indigo, TEMPO, galvinoxyl, phenol, naphthalene diimide -, pyrenedimide, perylenedimide and dibenzothiophenesulfone groups or substituted derivatives thereof. This can simplify the manufacture of the solid-state battery since the cathode can be manufactured using conventional processing methods for organic cathode materials, e.g. B. solution casting or similar.

The present disclosure further provides a vehicle that includes the solid-state battery described above. The vehicle is preferably equipped with a plurality of the solid-state batteries described above. The vehicle can be a heavy land vehicle, e.g. B. a truck or a bus, but is not limited to this. The vehicle can also be a fully electric, hybrid or fuel cell vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 shows schematically a cross-sectional view of an example of a solid-state battery according to the disclosure,
• 2 shows the redox reaction of an organic electroactive compound of the formula I,
• 3 shows an example vehicle at a charging station.

DETAILED DESCRIPTION

The invention is described in more detail below with reference to exemplary embodiments and the accompanying drawings. However, the invention is not limited to the exemplary embodiments discussed and/or shown in the drawings, but may be varied within the scope of the appended claims. Furthermore, the drawings are not to be considered to scale as some features may be exaggerated to better illustrate the invention or its features.

In the present disclosure, a solid-state battery is understood to mean a battery in which all components of the battery, including the electrolyte, are solid. Such a battery is sometimes referred to as a pure solid-state battery or a pure solid-state cell.

According to the present disclosure, a solid-state battery is provided. The solid-state battery described herein was developed primarily for use in vehicles, particularly land vehicles (e.g., heavy land vehicles), to replace lithium-ion batteries with a liquid electrolyte. According to one example, the solid-state battery can be a solid-state battery for a vehicle. However, it should be noted that the solid-state battery described herein may also be used in various other applications. In addition to land vehicles, but not limited to, various electrified power systems, power generation systems, backup power sources, construction and material handling equipment, agricultural machinery, watercraft, etc. may be suitable applications for the solid state battery disclosed herein.

The solid-state battery includes a cathode, an anode and a solid electrolyte. The electrolyte is arranged between the cathode and the anode and thus separates the cathode from the anode. The electrolyte is an electrically insulating solid ionic conductor that allows the movement of ions between the cathode and the anode. The anode is suitably a metallic anode (i.e. it is formed from elemental metal and/or one or more metallic alloys).

The cathode can be arranged in direct contact with the solid electrolyte or connected to the electrolyte via a first connecting layer. Similarly, the anode can be in direct contact with the solid electrolyte or connected to the solid electrolyte via a second connection layer. The first and second bonding layers may each be formed from a binder selected from the group consisting of polytetrafluoroethylene, polyvinylidene fluoride, polyethylene oxide, poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, polyacrylates, polyvinylpyrrolidone and carboxymethylcellulose. It is advantageous to connect the cathode and the anode because this facilitates ionic conduction at the interface between the electrolyte and the respective electrodes (i.e., the cathode and the anode).

Furthermore, the cathode and the anode can generally each be connected to a corresponding current collector. Such a current collector is arranged on a side of the cathode/anode opposite the electrolyte. Each current collector may be formed, for example, from graphite or another previously known current collector material suitable for solid-state batteries.

According to a first alternative, the cathode of the solid-state battery according to the disclosure comprises at least one organic electroactive compound of the formula I:

R1, R2, R3 and R4 are each independently selected from the group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl) , S(C ₁ -C ₃ -alkyl), SO ₂ H, SO ₃ H, SO ₂ NH ₂ , NH ₂ , NH(C ₁ -C ₃ -alkyl), N(C ₁ -C ₃ -alkyl) ₂ , COH, CO ₂ H, CO ₂ (C ₁ -C ₃ -alkyl), CONH ₂ , NHCOH, NHCO-C _1-3 -alkyl, OCONH-C=CH, CH=CH ₂ and Ph.

Preferably, R1, R2, R3 and R4 are each independently selected from the group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl ), S(C ₁ -C ₃ alkyl) and NH(C ₁ -C ₃ alkyl).

According to a second alternative, the cathode of the solid-state battery according to the disclosure comprises at least one organic electroactive compound of the formula II:

R5 and R6 are each independently selected from the group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl), S(C ₁ -C ₃ -alkyl), SO ₂ H, SO ₃ H, SO ₂ NH ₂ , NH ₂ , NH(C ₁ -C ₃ -alkyl), N(C ₁ -C ₃ -alkyl) ₂ , COH, CO ₂ H, CO ₂ (C ₁ -C ₃ alkyl), CONH ₂ , NHCOH, NHCO-C _1-3 alkyl, OCONH-C=CH, CH=CH ₂ and Ph.

L can be a direct bond. Alternatively, L is a covalent linker moiety with a structure -(CH ₂ ) _s -G ¹ -(CH ₂ ) _t -G ² - or -G ² -(CH ₂ ) _t -G ¹ -(CH ₂ ) _s -, where s is between 0 and 6 and t is between 0 and 6. G ¹ and G ² are each independently selected from the group consisting of a direct bond, O, S, SO ₂ , SO ₃ , O ₃ S, SO ₂ NH, NHSO ₂ , NH, N(C ₁ -C ₆ - alkyl), C(O), CO ₂ , O ₂ C, C(O)NH, NHC(O), OC(O)O, NHC(O)NH, NHC(O)O, OC(O)NH, C=C, CH=CH, Ph and Hy.

In addition, R7 is a polymer chain or selected from the group consisting of terephthalate, naphthoquinone, anthraquinone, catechol, quinone, quinizarin, naphthazarin, indigo, TEMPO, galvinoxyl, phenol, naphthalene diimide, pyrenediimide -, perylenedimide and dibenzothiophenesulfone groups or substituted derivatives thereof. Substituted derivatives thereof are to be understood as meaning derivatives which comprise one or more suitable organic substituent groups, for example one to five independently selected organic substituent groups. Suitable organic substituent groups are in particular F, CI, Br, I, C ₁ -C ₆ alkyl, OH, SH, CN, O(C _1-6 alkyl), S(C ₁ -C ₆ alkyl). R7 is suitably selected from the group consisting of terephthalate, naphthoquinone, anthraquinone, catechin, quinone, quinizarin, naphthazarin, indigo, TEMPO, galvinoxyl, phenol, naphthalene diimide, pyrenediimide, perylene diimide. and dibenzothiophenesulfone groups or substituted derivatives thereof.

The organic electroactive compound of formula I and the organic electroactive compound of formula II are each a quinoid and contain (i) an electron-withdrawing group (a benzene ring with covalently bonded oxygen atoms), which increases the redox potential, and (ii) protecting groups at positions 2,3 and 7,8 to make degradation by addition impossible.

The organic electroactive compound of Formula II (which is a polymer) has the advantages over the organic electroactive compound of Formula I that it has higher stability and enables similar processing to other polymer components in solid-state batteries. However, the organic electroactive compound of the formula I (which is a molecule) has the advantage over the organic electroactive compound of the formula II that it is lighter and thereby enables a higher specific capacity of the cathode.

According to a third alternative, the cathode of the solid-state battery according to the disclosure comprises a first organic electroactive compound of the formula I described above and a second organic electroactive compound of the formula II described above. According to a further alternative, the cathode comprises two or more organic electroactive compounds of the formula I, wherein the two or more organic electroactive compounds of the formula I differ from one another. According to a further alternative, the cathode comprises two or more organic electroactive compounds of the formula II, wherein the two or more organic electroactive compounds of the formula II differ from one another.

Regardless of the alternatives described above, the cathode can comprise further components in addition to the at least one electroactive compound of the formula I or the formula II. In particular, the cathode can expediently comprise one or more binders and/or one or more conductive additives. This binder can expediently be selected from the group consisting of polytetrafluoroethylene, polyvinylidene fluoride, polyethylene oxide, poly (3,4-ethylenedioxythiophene), polystyrene sulfonate, polyacrylates, polyvinylpyrrolidone and carboxymethyl cellulose. The one or more conductive additives may suitably be selected from the group consisting of carbon black, graphite powder, graphene, carbon nanorods and carbon nanotubes. If desired, the cathode may also comprise one or more electroactive compounds other than the electroactive compound of Formula I or the electroactive compound of Formula II.

The at least one organic electroactive compound of the formula I or the formula II described above can expediently be present in an amount which corresponds to at least 30% by weight of the cathode. It should be noted that the current collector to which the cathode is attached should not be counted in the total weight of the cathode. The specific capacity of the cathode increases as the amount of the at least one organic electroactive compound increases. The at least one organic electroactive compound of the formula I or the formula II is expediently present in an amount which corresponds to at least 50% by weight of the cathode. However, the amount of the organic electroactive compound of the formula I or the organic electroactive compound of the formula II (or, if both compounds are present, their total amount) should not be too high, as this will, for example, result in reduced stability of the cathode and/or poorer charge transfer from the electroactive material of the cathode to the neighboring current collector. The at least one organic electroactive compound of the formula I or the formula II is expediently present in an amount of up to 90% by weight of the cathode (in the case of a cathode which comprises both the compound of the formula I and the compound of the formula II, The total amount of organic electroactive compounds should not exceed 90% by weight of the cathode). According to an alternative, the remainder may consist of one or more binders and/or one or more conductive additives.

The cathode expediently comprises at most 75% by weight of the organic electroactive compound of the formula I and also at least one binder as described above (or alternatively also the electroactive compound of the formula II). This ensures sufficient stability of the cathode. In this case, the cathode can expediently also comprise one or more conductive additives as described above in order to ensure a desired charge transfer between the electroactive connection of the cathode and the current collector. According to one embodiment, the cathode consists of 30 to 75% by weight (including the final values) of the organic electroactive compound of formula I, the remainder being one or more binders and one or more conductive additives.

If the cathode comprises the organic electroactive compound of formula II, the cathode does not necessarily require a binder, but may advantageously comprise at least one conductive additive to ensure a desired charge transfer from the electroactive material to the current collector. In other words: In this case, the cathode can only comprise the organic electroactive compound of formula II and, if desired, one or more conductive additives.

The anode of the solid-state battery can expediently comprise or consist of lithium (Li). The anode may be formed, for example, from lithium metal or a lithium-based alloy. Alternatively, the anode of the solid-state battery may include or consist of sodium (Na). The anode may be formed, for example, from sodium metal or a sodium-based alloy. According to another example, the anode may be formed from a lithium-sodium based alloy.

As mentioned above, the electrolyte of the solid-state battery is an ionically conductive solid-state electrolyte. The electrolyte can be, for example, an inorganic solid electrolyte, e.g. B. an oxide-based electrolyte, a sulfide-based electrolyte or a phosphate-based electrolyte. The inorganic solid electrolyte expediently comprises or consists of an ion-conducting compound selected from a lithium-containing oxide, a sodium-containing oxide, a lithium and sodium-containing oxide, a lithium-containing sulfide, a sodium-containing sulfide or a lithium and sodium-containing sulfide. Examples of suitable inorganic solid electrolytes are in particular LISICON or LISICON-like electrolytes (such as Li _2+2x Zn _1-x GeO ₄ , Li _(3+x) Ge _x V _{(1- x)} O ₄ or Li _(4-x) Ge _(1-x) P _x S ₄ , Li ₁₀ MP ₂ S ₁₂ (M = Si, Ge or Sn) or Li ₁₁ Si ₂ PS ₁₂ ) or NASICON or NASICON-like electrolytes (such as Na _1+x Zr ₂ Si _x P _3-x O ₁₂ or Li _1+x Al _x Ge _2-x (PO ₄ ) ₃ ). Such inorganic solid electrolytes are already known per se and are therefore not described further in the present disclosure.

Alternatively, the electrolyte can be a solid polymer electrolyte. The solid polymer electrolyte may comprise, for example, one or more of the following materials: poly(ethylene oxide), poly(propylene oxide), poly(acrylonitrile), poly(methyl methacrylate), poly(vinyl chloride), poly(vinylidene fluoride) and/or poly(vinylidene fluoride-hexafluoropropylene ).

The at least one organic electroactive compound of the formula I is already known per se and can be synthesized by any already known process. Likewise, the at least one organic electroactive compound of the formula II is already known per se and can be prepared by any already known process.

In addition, the cathode can be produced using already known processes. For example, the components of the cathode (i.e. including the organic electroactive compound(s), the binder(s) and/or the conductive additive(s) may be mixed with a solvent and the resulting mixture can be applied to a current collector and the solvent is evaporated. Alternatively, the cathode can be manufactured separately (e.g. by a dry process) and attached to the current collector using a binder. The electrolyte can then be cold pressed and/or using a binder can be attached to the cathode. Similarly, the anode can be attached to the electrolyte using a binder.

1 shows schematically a cross-sectional view of an example of a solid-state battery 1 according to the disclosure. The solid-state battery 1 comprises a cathode 2. The cathode 2 can be connected to a first current collector 3. The solid-state battery 1 further comprises an anode 4. The anode 4 can be connected to a second current collector 5. The solid-state battery 1 further comprises a solid-state electrolyte 6, which is arranged between the cathode 2 and the anode 4, since it is expediently connected to them. The solid electrolyte 6 separates the cathode 2 from the anode 4 in such a way that the cathode 2 and the anode 4 are electrically insulated from one another. The first and second current collectors 3, 5 can in turn be connected to a load (when discharging) or a charger (when charging). The box 10 in 1 represents the load/charger. The load/charger is not considered a component of the solid-state battery 1 itself.

2 shows the redox reaction of the organic electroactive compound of the formula I. In the figure, M1 and M2 each represent a metal atom, e.g. B. lithium or sodium, or hydrogen. As shown in the figure, there are two main oxidation reactions that take place at different potentials. During the first oxidation reaction at a comparably low potential, 2 electrons and 2 cations (M2 ⁺ ) are released. Further oxidation at a comparable higher potential results in the release of an additional 2 electrons and 2 cations (M1 ⁺ ). In a preferred embodiment, only the second redox reaction is used during battery operation.

Although not shown, the redox reaction of the organic electroactive compound of formula II is in 2 The redox reaction shown is similar in that the oxygen groups on the first ring act as an electron-withdrawing group.

3 shows an exemplary vehicle 11, shown here as a bus, at a charging station 12. The vehicle includes a power collector, shown here in the form of a current collector 13, which is configured such that the vehicle 11 can be connected to the charging station 12 to form an energy storage device 14 (shown schematically in the figure by dashed lines) to be loaded on board the vehicle 11. The energy storage device 14 of a vehicle 11 may include a plurality of the solid-state batteries 1 described above. The solid-state batteries can be connected in series and/or parallel.

Claims (11)

Solid-state battery (1) comprising a cathode (2), an anode (4) and an electrolyte (6), the cathode (2) comprising at least one organic electroactive compound of the formula I or formula II,

where R1 to R6 are each independently selected from a group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl), S( C ₁ -C ₃ alkyl), SO ₂ H, SO ₃ H, SO ₂ NH ₂ , NH ₂ , NH(C ₁ -C ₃ alkyl), N(C ₁ -C ₃ alkyl) ₂ , COH, CO ₂ H, CO ₂ (C ₁ -C ₃ alkyl), CONH ₂ , NHCOH, NHCO-C _1-3 alkyl, OCONH-C=CH, CH=CH ₂ and Ph; L either a direct bond or a covalent linker moiety with a structure -(CH ₂ ) _s -G ¹ -(CH ₂ ) _t -G ² - or -G ² -(CH ₂ ) _t -G ¹ -(CH ₂ ) _s - is; s is from 0 to 6; t is from 0 to 6; G ¹ and G ² are each independently selected from a group consisting of a direct bond, O, S, SO ₂ , SO ₃ , O ₃ S, SO ₂ NH, NHSO ₂ , NH, N(C ₁ -C ₆ - alkyl), C(O), CO ₂ , O ₂ C, C(O)NH, NHC(O), OC(O)O, NHC(O)NH, NHC(O)O, OC(O)NH, C=C, CH=CH, Ph and Hy; and R7 is a polymer chain or is selected from a group consisting of terephthalate, naphthoquinone, anthraquinone, catechol, quinone, quinizarin, naphthazarin, indigo, TEMPO, galvinoxyl, phenol, naphthalene diimide, pyrenediimide. , perylenedimide and dibenzothiophene sulfone groups or substituted derivatives thereof. Solid state battery (1). Claim 1 , wherein the cathode (2) further comprises at least one binder selected from a group consisting of polytetrafluoroethylene, polyvinylidene fluoride, polyethylene oxide, poly (3,4-ethylenedioxythiophene), polystyrene sulfonate, polyacrylates, polyvinylpyrrolidone and carboxymethyl cellulose. Solid-state battery (1) according to one of the Claims 1 or 2 , wherein the cathode (2) further comprises at least one conductive additive selected from a group consisting of carbon black, graphite powder, graphene, carbon nanorods and carbon nanotubes. Solid-state battery (1) according to one of the preceding claims, wherein the at least one organic electroactive compound of the formula I or the formula II is present in an amount which is at least 30% by weight of the cathode, preferably at least 50% by weight of the cathode ( 2), corresponds. Solid-state battery (1) according to one of the preceding claims, wherein the anode (4) comprises lithium metal, sodium metal or an alloy based on lithium and/or sodium. Solid-state battery (1) according to one of the preceding claims, wherein the electrolyte (6) is an inorganic solid-state electrolyte. Solid state battery (1). Claim 6 , wherein the inorganic solid electrolyte comprises an ion-conducting compound selected from a lithium- and/or sodium-containing oxide and/or a lithium- and/or sodium-containing sulfide. Solid-state battery (1) according to one of the Claims 1 until 5 , where the electrolyte (6) is a solid polymer electrolyte. Solid state battery (1). Claim 8 , wherein the solid polymer electrolyte comprises poly(ethylene oxide), poly(propylene oxide), poly(acrylonitrile), poly(methyl methacrylate), poly(vinyl chloride), poly(vinylidene fluoride) and/or poly(vinylidene fluoride-hexafluoropropylene). Solid-state battery (1) according to one of the preceding claims, wherein the cathode (2) comprises at least one organic electroactive compound of the formula I and R1 to R4 are each independently selected from a group consisting of H, F, CI, Br, I, C ₁ -C ₃ alkyl, OH, SH, CN, O(C _1-3 alkyl), S(C ₁ -C ₃ alkyl) and NH(C ₁ -C ₃ alkyl). Vehicle (11) comprising the solid-state battery (1) according to one of the preceding claims.

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