CN107658138B - Li6CoO4The preparation method and lithium-ion capacitor of prelithiation agent and lithium-ion capacitor - Google Patents
Li6CoO4The preparation method and lithium-ion capacitor of prelithiation agent and lithium-ion capacitor Download PDFInfo
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Abstract
A kind of Li6CoO4The preparation method of prelithiation agent, comprising the following steps: (1) cobalt salt is dissolved in dehydrated alcohol, fatty acid is added, ultrasonic mixing, which is uniformly placed in autoclave, reacts, then cooling, then wash, filter, dry after obtain nano Co O；(2) by nano Co O and Li obtained in step (1)2O carries out ball milling after mixing, obtains Li after being then sintered and cooled in atmosphere of inert gases6CoO4.Li is used the present invention also provides a kind of6CoO4The preparation method of the lithium-ion capacitor of prelithiation.Li in the present invention6CoO4It is not harsh to environmental requirement, it can be coated together with positive electrode, easy to operate, the prelithiation degree of cathode pole piece is controllable, and effect is obvious, and can realize under existing lithium electricity manufacturing condition, can substantially reduce production cost.
Description
Technical field
The invention belongs to the preparation method of energy storage device field more particularly to a kind of lithium-ion capacitor and prelithiation agent and
Capacitor.
Background technique
Lithium-ion capacitor has energy density more higher than double layer capacitor and power density more higher than lithium battery,
There is huge application potential in terms of such as wind-power electricity generation, electric car, power generation industries in emerging energy field.Prelithiation
Technology is the core technology of lithium-ion capacitor, and generally acknowledged technological difficulties.Currently, common prelithiation technology in lithium capacitor
Predominantly cathode sprays lithium powder method, although this method and process is relatively simple, there are lithium metals using insufficient, compensation rate is difficult
The problems such as control, slurry unevenness cause local lithiumation excessive.Therefore, simple, efficient prelithiation technology is developed with extremely heavy
The meaning wanted.
Li6CoO4With very high specific capacity, theoretical capacity is greater than 985mAhg-1, other its first charge-discharge efficiency
It is low, therefore can use its irreversible capacity for the first time, realize the prelithiation to lithium capacitor.But prior synthesizing method preparation
Li6CoO4Capacity it is lower, it is mainly oversized due to presoma, lead to the Li finally synthesized6CoO4Partial size it is excessive,
Influence Li6CoO4Chemical property.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, one kind is provided
High, the easy to operate use Li of energy density6CoO4The lithium-ion capacitor of prelithiation and the preparation method of prelithiation agent, and phase
Its lithium-ion capacitor being prepared should be provided.In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of Li6CoO4The preparation method of prelithiation agent, comprising the following steps:
(1) cobalt salt is dissolved in dehydrated alcohol, fatty acid is added, ultrasonic mixing is uniformly placed in autoclave instead
Answer, it is then cooling, then wash, filter, dry after obtain nano Co O；
(2) by nano Co O and Li obtained in step (1)2O carries out ball milling after mixing, then in inert gas atmosphere
Li is obtained after being sintered and cooled in enclosing6CoO4。
Above-mentioned Li6CoO4In the preparation method of prelithiation agent, it is preferred that the cobalt salt is cobalt chloride, cobalt nitrate, cobaltous sulfate
One or more of with cobalt acetate, the concentration of the cobalt ions is 0.05~0.5moLL-1, the fatty acid is oleic acid, palm fibre
One or more of palmitic acid acid, linoleic acid and stearic acid, the volume ratio of the dehydrated alcohol and fatty acid are 5~20:1.Oleic acid
It is a kind of weak acid, oleic acid molecular can ionize fuel-displaced acid group and hydrogen ion, and oleate ions can form complex compound with cobalt ions, most
Esterification occurs with ethanol molecule under the conditions of solvent heat afterwards and generates CoO solid nanospheres, above-mentioned such ratio being capable of shape
At the smaller particle of partial size, the specific surface area of material can be increased.
Above-mentioned Li6CoO4In the preparation method of prelithiation agent, it is preferred that the partial size of the nano Co O is 100~300nm,
The Li2The molar ratio of O and nano Co O are 2~5:1, more preferably 3:1.
Above-mentioned Li6CoO4In the preparation method of prelithiation agent, it is preferred that in the step (1), in the autoclave
The reaction condition of reaction are as follows: reaction temperature is 120~200 DEG C, and the time is 4~8h；In the step (2), the item of the sintering
Part are as follows: sintering temperature is 600~900 DEG C, and the time is 12~48h.
As a general technical idea, Li is used the present invention also provides a kind of6CoO4The lithium-ion capacitor of prelithiation
Preparation method, comprising the following steps: by positive electrode active materials, Li6CoO4Prelithiation agent, conductive agent and binder are after mixing
The anode pole piece of lithium-ion capacitor is obtained through subsequent processing, after mixing by negative electrode active material, conductive agent and binder
The cathode pole piece of lithium-ion capacitor is obtained through subsequent processing, then is activated realization negative electrode material after positive/negative plate is assembled
Prelithiation obtain lithium-ion capacitor.
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that the Li6CoO4Pre- lithium
Agent is by above-mentioned Li6CoO4The preparation method of prelithiation agent is prepared.
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that the positive-active material
Material is one or more of active carbon, graphene and carbon aerogels, and the negative electrode active material is in graphite, hard carbon and soft carbon
One or more.
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that in the anode pole piece,
The Li6CoO4The quality of prelithiation agent is the 2~50% of anode pole piece gross mass, the gross mass of the conductive agent and binder
It is the 2~20% of anode pole piece quality；In the cathode pole piece, the gross mass of the conductive agent and binder is cathode pole piece matter
The 2~20% of amount.
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that the positive-active material
The mass ratio of material and negative electrode active material is 0.5~4:1.
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that the Li6CoO4Pre- lithium
The initial charge capacity of agent is 470~850mAhg-1, first charge-discharge efficiency is 1~15%, and partial size compares table less than 10 μm
Area is 200~900m2·g-1。
It is above-mentioned to use Li6CoO4In the preparation method of the lithium-ion capacitor of prelithiation, it is preferred that the activation processing is
By charge and discharge cycles twice, charging for the first time carries out constant current or constant-voltage charge using 0.02~0.1C, and blanking voltage is 3.8~
4.5V, for the first time electric discharge carry out constant-current discharge using 1~3C, and blanking voltage is 1.8~2.2V, second charging using 0.05~
0.1C carries out constant current or constant-voltage charge, and blanking voltage is 3.8~4.2V, and second of electric discharge carries out constant-current discharge using 1~3C, cut
Only voltage is 1.8~2.2V.In activation process, low current is used when charging, the lithium in material can be made completely out,
High current is used when electric discharge, can destroy material structure, is returned lithium and is not gone.
As a general technical idea, the present invention also provides a kind of lithium-ion capacitor, the lithium-ion capacitor
Energy density is 52~140Whkg-1, power density is 6~12kWkg-1。
Compared with the prior art, the advantages of the present invention are as follows:
1, Li is utilized in the present invention6CoO4Irreversible capacity for the first time, the condition being activated by optimization realizes to negative
The prelithiation of pole avoids the problems such as lithium metal is excessive using insufficient or part, can also reduce negative potential, be in cathode
One it is low and on stabilised platform, improve the cyclical stability of lithium-ion capacitor, and lithium can be mended into system, reduce first
The loss of lithium is simultaneously in secondary irreversible (formed SEI film) and cyclic process.Meanwhile the Li after de- lithium6CoO4Become oxo transition metal
Compound, and transition metal oxide has capacitance characteristic, increases the capacity of anode, improves the energy density of entire device.
2, Li in the present invention6CoO4It is not harsh to environmental requirement, it can be coated together with positive electrode, it is easy to operate,
The prelithiation degree of cathode pole piece is controllable, and effect is obvious, and can realize under existing lithium electricity manufacturing condition, can substantially reduce life
Produce cost.
3, the present invention is by controlling and optimizing Li6CoO4The synthesis condition of prelithiation agent, the Li of preparation6CoO4Prelithiation agent
Capacity it is higher, it is first effect it is lower.Capacity is higher, and the lithium deviate from anode is more, and head effect is lower, and the lithium for returning to anode is fewer.
Meanwhile material has lesser partial size, high specific surface area, high specific surface area can provide more for the effect of active ion
Active site.
Specific embodiment
To facilitate the understanding of the present invention, present invention work more comprehensively, is meticulously described below in conjunction with preferred embodiment,
But the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1:
It is a kind of to use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, comprising the following steps:
1、Li6CoO4Preparation:
(1) nano Co O is prepared using heat of solution method: cobalt nitrate being dissolved in dehydrated alcohol, wherein the concentration of cobalt ions is
0.05moL·L-1, oleic acid is added and the volume ratio for controlling dehydrated alcohol and oleic acid is 5:1, after ultrasonic mixing is uniform, by mixed liquor
It is transferred in autoclave, 4h, subsequent natural cooling, by obtaining partial size after washing, filtering, drying is reacted at 130 DEG C
For the nano Co O of 280nm；
(2) Li is weighed for 3:1 in molar ratio2After O and nano Co O, ball milling 6h, under the conditions of argon gas, reacted at 600 DEG C
12h, obtaining partial size after cooling is 10 μm, capacity 560mAhg-1, head effect is 10%, specific surface area 200m2·g-1's
Li6CoO4。
2, by active carbon (50wt%), Li6CoO4Prelithiation agent (30wt%), Super P (10wt%) and PVDF
(10wt%) is uniformly mixed, and by sizing mixing, coating, dry, roll, obtains anode pole piece.
3, after mixing by graphite (90wt%), Super P (5wt%) and PVDF (5wt%), by sizing mixing, coating,
Drying, rolling, obtain cathode pole piece.
4, the mass ratio for controlling positive and negative anodes active material is 0.5, realizes cathode material through being activated after positive/negative plate assembling
The prelithiation of material obtains lithium-ion capacitor, wherein the condition of activation processing is as shown in table 1 below.
Table 1: the condition of the activation processing in embodiment 1
| Circulation | Starting voltage | Blanking voltage | Mechanism |
| It (charges) for the first time | OCV (open-circuit voltage) | 3.8V | Constant-current charge (0.05C) |
| It (charges) for the first time | 3.8V | 4.5V | Constant current, constant-voltage charge (0.05C) |
| It (discharges) for the first time | 4.5V | 2.0V | Constant-current discharge (1C) |
| Second (charging) | 2.0V | 4.0V | Constant-current charge (0.1C) |
| Second (electric discharge) | 4.0V | 2.0V | Constant-current discharge (1C) |
After tested, maximum energy-density is 52Whkg in the lithium capacitor assembled in the present embodiment-1, maximum power density is
7kW·kg-1(using positive and negative electrode active material quality sum as gross mass).
Embodiment 2:
It is a kind of to use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, comprising the following steps:
1、Li6CoO4Preparation:
(1) nano Co O is prepared using heat of solution method: cobaltous sulfate being dissolved in dehydrated alcohol, wherein the concentration of cobalt ions is
0.2moL·L-1, palmitinic acid is added and the volume ratio for controlling dehydrated alcohol and palmitinic acid is 10:1, after ultrasonic mixing is uniform, will mix
It closes liquid to be transferred in autoclave, 6h, subsequent natural cooling, by obtaining after washing, filtering, drying is reacted at 140 DEG C
Partial size is the nano Co O of 180nm；
(2) Li is weighed for 3:1 in molar ratio2After O and nano Co O, ball milling 6h, under the conditions of argon gas, reacted at 700 DEG C
12h, obtaining partial size after cooling is 8 μm, Li6CoO4Capacity be 470mAhg-1, head effect is 13%, and specific surface area is
350m2·g-1Li6CoO4。
2, by active carbon (70wt%), Li6CoO4Prelithiation agent (10wt%), Super P (10wt%) and PVDF
(10wt%) is uniformly mixed, and by sizing mixing, coating, dry, roll, obtains anode pole piece.
3, after mixing by graphite (90wt%), Super P (5wt%) and PVDF (5wt%), by sizing mixing, coating,
Drying, rolling, obtain cathode pole piece.
4, the mass ratio for controlling positive and negative anodes active material is 1, realizes negative electrode material through being activated after positive/negative plate assembling
Prelithiation obtain lithium-ion capacitor, wherein the condition of activation processing is as shown in table 2 below.
Table 2: the condition of the activation processing in embodiment 2
| Circulation | Starting voltage | Blanking voltage | Mechanism |
| It (charges) for the first time | OCV (open-circuit voltage) | 4.5V | Constant-current charge (0.02C) |
| It (discharges) for the first time | 4.5V | 2.0V | Constant-current discharge (2C) |
| Second (charging) | 2.0V | 4.0V | Constant-current charge (0.05C) |
| Second (electric discharge) | 4.0V | 2.0V | Constant-current discharge (2C) |
After tested, maximum energy-density is 85Whkg in the lithium capacitor assembled in the present embodiment-1, maximum power density is
12kW·kg-1(using positive and negative electrode active material quality sum as gross mass).
Embodiment 3:
It is a kind of to use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, comprising the following steps:
1、Li6CoO4Preparation:
(1) nano Co O is prepared using heat of solution method: cobalt acetate being dissolved in dehydrated alcohol, wherein the concentration of cobalt ions is
0.3moL·L-1, it is 18:1 that linoleic acid, which is added, and controls dehydrated alcohol and linoleic volume ratio, after ultrasonic mixing is uniform, will be mixed
It closes liquid to be transferred in autoclave, 4h, subsequent natural cooling, by obtaining after washing, filtering, drying is reacted at 180 DEG C
Partial size is the nano Co O of 130nm；
(2) Li is weighed for 3:1 in molar ratio2After O and nano Co O, ball milling 8h, under the conditions of argon gas, reacted at 750 DEG C
15h, obtaining partial size after cooling is 5 μm, Li6CoO4Capacity be 780mAhg-1, head effect is 6%, and specific surface area is
900m2·g-1Li6CoO4。
2, by active carbon (60wt%), Li6CoO4Prelithiation agent (25wt%), Super P (10wt%) and PVDF
(5wt%) is uniformly mixed, and by sizing mixing, coating, dry, roll, obtains anode pole piece.
3, after mixing by graphite (90wt%), Super P (5wt%) and PVDF (5wt%), by sizing mixing, coating,
Drying, rolling, obtain cathode pole piece.
4, the mass ratio for controlling positive and negative anodes active material is 2, realizes negative electrode material through being activated after positive/negative plate assembling
Prelithiation obtain lithium-ion capacitor, wherein the condition of activation processing is as shown in table 3 below.
Table 3: the condition of the activation processing in embodiment 3
| Circulation | Starting voltage | Blanking voltage | Mechanism |
| It (charges) for the first time | OCV (open-circuit voltage) | 4.5V | Constant-current charge (0.05C) |
| It (discharges) for the first time | 4.5V | 1.8V | Constant-current discharge (2C) |
| Second (charging) | 1.8V | 4.2V | Constant-current charge (0.05C) |
| Second (electric discharge) | 4.2V | 1.8V | Constant-current discharge (2C) |
After tested, maximum energy-density is 113Whkg in the lithium capacitor assembled in the present embodiment-1, maximum power density
For 10kWkg-1(using positive and negative electrode active material quality sum as gross mass).
Embodiment 4:
It is a kind of to use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, comprising the following steps:
1、Li6CoO4Preparation:
(1) nano Co O is prepared using heat of solution method: cobalt nitrate being dissolved in dehydrated alcohol, wherein the concentration of cobalt ions is
0.5moL·L-1, it is 15:1 that stearic acid, which is added, and controls dehydrated alcohol and stearic volume ratio, after ultrasonic mixing is uniform, will be mixed
It closes liquid to be transferred in autoclave, 8h, subsequent natural cooling, by obtaining after washing, filtering, drying is reacted at 190 DEG C
Partial size is the nano Co O of 240nm；
(2) Li is weighed for 3:1 in molar ratio2After O and nano Co O, ball milling 6h, under the conditions of argon gas, reacted at 900 DEG C
15h, obtaining partial size after cooling is 9 μm, Li6CoO4Capacity be 850mAhg-1, head effect is 3%, and specific surface area is
670m2·g-1Li6CoO4。
2, by active carbon (70wt%), Li6CoO4Prelithiation agent (15wt%), Super P (8wt%) and PVDF (7wt%)
It is uniformly mixed, by sizing mixing, coating, dry, roll, obtains anode pole piece.
3, after mixing by graphite (90wt%), Super P (5wt%) and PVDF (5wt%), by sizing mixing, coating,
Drying, rolling, obtain cathode pole piece.
4, the mass ratio for controlling positive and negative anodes active material is 3, realizes negative electrode material through being activated after positive/negative plate assembling
Prelithiation obtain lithium-ion capacitor, wherein the condition of activation processing is as shown in table 4 below.
Table 4: the condition of the activation processing in embodiment 4
| Circulation | Starting voltage | Blanking voltage | Mechanism |
| It (charges) for the first time | OCV (open-circuit voltage) | 4.0V | Constant-current charge (0.1C) |
| It (charges) for the first time | 4.0V | 4.3V | Constant current, constant-voltage charge (0.1C) |
| It (discharges) for the first time | 4.3V | 2.0V | Constant-current discharge (3C) |
| Second (charging) | 2.0V | 4.0V | Constant-current charge (0.1C) |
| Second (electric discharge) | 4.0V | 2.0V | Constant-current discharge (3C) |
After tested, maximum energy-density is 128Whkg in the lithium capacitor assembled in the present embodiment-1, maximum power density
For 8kWkg-1(using positive and negative electrode active material quality sum as gross mass).
Embodiment 5:
It is a kind of to use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, comprising the following steps:
1、Li6CoO4Preparation:
(1) nano Co O is prepared using heat of solution method: cobalt chloride being dissolved in dehydrated alcohol, wherein the concentration of cobalt ions is
0.1moL·L-1, oleic acid is added and the volume ratio for controlling dehydrated alcohol and oleic acid is 5:1, after ultrasonic mixing is uniform, by mixed liquor
It is transferred in autoclave, 4h, subsequent natural cooling, by obtaining partial size after washing, filtering, drying is reacted at 130 DEG C
For the nano Co O of 245nm；
(2) Li is weighed for 3:1 in molar ratio2After O and nano Co O, ball milling 6h, under the conditions of argon gas, reacted at 850 DEG C
12h, obtaining partial size after cooling is 7 μm, Li6CoO4Capacity be 670mAhg-1, head effect is 9%, and specific surface area is
550m2·g-1Li6CoO4。
2, by active carbon (40wt%), Li6CoO4Prelithiation agent (40wt%), Super P (10wt%) and PVDF
(10wt%) is uniformly mixed, and by sizing mixing, coating, dry, roll, obtains anode pole piece.
3, after mixing by graphite (90wt%), Super P (5wt%) and PVDF (5wt%), by sizing mixing, coating,
Drying, rolling, obtain cathode pole piece.
4, the mass ratio for controlling positive and negative anodes active material is 0.5, realizes cathode material through being activated after positive/negative plate assembling
The prelithiation of material obtains lithium-ion capacitor, wherein the condition of activation processing is as shown in table 5 below.
Table 5: the condition of the activation processing in embodiment 5
| Circulation | Starting voltage | Blanking voltage | Mechanism |
| It (charges) for the first time | OCV (open-circuit voltage) | 4.3V | Constant-current charge (0.02C) |
| It (discharges) for the first time | 4.3V | 2.2V | Constant-current discharge (2C) |
| Second (charging) | 2.2V | 4.0V | Constant-current charge (0.02C) |
| Second (electric discharge) | 4.0V | 2.2V | Constant-current discharge (2C) |
After tested, maximum energy-density is 140Whkg in the lithium capacitor assembled in the present embodiment-1, maximum power density
For 6kWkg-1(using positive and negative electrode active material quality sum as gross mass).
Claims (7)
1. a kind of use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, which comprises the following steps: will
Positive electrode active materials, Li6CoO4Lithium-ion capacitance is obtained through subsequent processing after prelithiation agent, conductive agent and binder are uniformly mixed
The anode pole piece of device obtains lithium-ion capacitance through subsequent processing after being uniformly mixed negative electrode active material, conductive agent and binder
The cathode pole piece of device, then be activated after positive/negative plate is assembled and realize that the prelithiation of negative electrode material obtains lithium-ion capacitance
Device；
Wherein, the Li6CoO4The preparation method of prelithiation agent, comprising the following steps:
(1) cobalt salt being dissolved in dehydrated alcohol, fatty acid is added, ultrasonic mixing, which is uniformly placed in autoclave, reacts, with
After cool down, then wash, filter, dry after obtain nano Co O；
(2) by nano Co O and Li obtained in step (1)2O carries out ball milling after mixing, then burns in atmosphere of inert gases
Knot obtains Li after cooling6CoO4；
It is described to be activated as by charge and discharge cycles twice, charging carries out constant current using 0.02 ~ 0.1C for the first time or constant pressure is filled
Electricity, blanking voltage be 3.8 ~ 4.5V, for the first time electric discharge using 1 ~ 3C carry out constant-current discharge, blanking voltage be 1.8 ~ 2.2V, second
Secondary charging carries out constant current or constant-voltage charge using 0.05 ~ 0.1C, and blanking voltage is 3.8 ~ 4.2V, second of electric discharge using 1 ~ 3C into
Row constant-current discharge, blanking voltage are 1.8 ~ 2.2 V.
2. according to claim 1 use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, which is characterized in that
The cobalt salt is one or more of cobalt chloride, cobalt nitrate, cobaltous sulfate and cobalt acetate, concentration of the cobalt ions in dehydrated alcohol
For 0.05 ~ 0.5moLL-1, the fatty acid is one or more of oleic acid, palmitinic acid, linoleic acid and stearic acid, the nothing
The volume ratio of water-ethanol and fatty acid is 5 ~ 20:1.
3. according to claim 1 use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, which is characterized in that
The partial size of the nano Co O is 100 ~ 300nm, the Li2The molar ratio of O and nano Co O are 2 ~ 5:1.
4. according to claim 1 use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, which is characterized in that
In the anode pole piece, the Li6CoO4The quality of prelithiation agent is the 2 ~ 50% of anode pole piece gross mass, the conductive agent and viscous
The gross mass for tying agent is the 2 ~ 20% of anode pole piece quality；In the cathode pole piece, the gross mass of the conductive agent and binder is
The 2 ~ 20% of cathode pole piece quality.
5. according to claim 4 use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, which is characterized in that
The mass ratio of the positive electrode active materials and negative electrode active material is 0.5 ~ 4:1.
6. according to claim 1 use Li6CoO4The preparation method of the lithium-ion capacitor of prelithiation, feature exist
In the Li6CoO4The initial charge capacity of prelithiation agent is 470 ~ 850mAhg-1, first charge-discharge efficiency is 1 ~ 15%, grain
For diameter less than 10 μm, specific surface area is 200 ~ 900m2·g-1。
7. a kind of use Li as described in any one of claim 1 ~ 66CoO4The preparation method of the lithium-ion capacitor of prelithiation
The lithium-ion capacitor being prepared, which is characterized in that the energy density of the lithium-ion capacitor is 52 ~ 140Whkg-1,
Power density is 6 ~ 12kWkg-1。
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| CN110224114A (en) * | 2018-03-01 | 2019-09-10 | 安普瑞斯（南京）有限公司 | A kind of anode material for lithium ion battery and preparation method thereof |
| CN110224169B (en) * | 2018-03-01 | 2021-09-14 | 安普瑞斯（南京）有限公司 | High-energy-density lithium ion battery |
| CN109346335A (en) * | 2018-09-28 | 2019-02-15 | 桑顿新能源科技有限公司 | Lithium source active material, anode pole piece, lithium-ion capacitor and preparation method thereof |
| CN109748328B (en) * | 2019-03-19 | 2021-12-14 | 中南大学 | Pre-lithiation agent, preparation method and method for preparing capacitor by using pre-lithiation agent |
| CN111725576B (en) * | 2020-07-09 | 2024-04-09 | 湖北融通高科先进材料集团股份有限公司 | Carbon-coated lithium-rich oxide composite material and preparation method thereof |
| CN113036106A (en) * | 2021-03-09 | 2021-06-25 | 昆山宝创新能源科技有限公司 | Composite lithium supplement additive and preparation method and application thereof |
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