CN1805179A - Preparation method of positive electrode material of lithium ion cell in spinel structure LiCoxMn2-XO4 (0<=X<=0.2) - Google Patents
Preparation method of positive electrode material of lithium ion cell in spinel structure LiCoxMn2-XO4 (0<=X<=0.2) Download PDFInfo
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- CN1805179A CN1805179A CNA2005100069559A CN200510006955A CN1805179A CN 1805179 A CN1805179 A CN 1805179A CN A2005100069559 A CNA2005100069559 A CN A2005100069559A CN 200510006955 A CN200510006955 A CN 200510006955A CN 1805179 A CN1805179 A CN 1805179A
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- lithium
- solid
- discharge capacity
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- anode material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a method for preparing the anode of lithium battery, belonging to the high energy battery technique. The method that preparing sharp-crystal LiCoxMn2-xO4 (0<=X<=0.2) anode material comprises: milling the solid lithium salt, solid cobalt salt, solid manganese salt and solid organic acid to prepare the leading element of mixture, which can be baked in certain temperature to attain the anode material LiCoxMn2-xO4 (0<=X<=0.2). The invention has simple operation, lower energy consumption, environment protection and wider application. The inventive product is black powder in ball shape and trending to form rod, while its diameter is 10-50nm with better electric chemical property. Wherein, the first discharge capacity of LiMnO4 is 124. 4mAh/g, and the first discharge/discharge capacity of LiCoxMn2-xO4 is lower while it ahs better cycle property than the LiMnO4. And when mixing the prepared nanometer LiMnO4 and the general LiMnO4 in 1:9, the first discharge capacity can reach 122.9mAh/g, and after discharged for 50 times, the discharge capacity is reduced 6.8% (discharging in C/3 rate).
Description
Technical field the invention belongs to the technical field of the positive electrode that high-energy battery technical field, particularly synthesizing lithium ion battery use.
The background technology lithium ion battery has advantages such as specific energy height, environmental pollution be little, is widely used in the equipment such as mobile phone, portable computer, camera.The research of its positive electrode is the research emphasis of lithium ion battery.Commercially available lithium ion battery mainly adopts LiCoO at present
2Make positive electrode, but because Co resource shortage and price are relatively costly, and the manganese aboundresources, cheap and asepsis environment-protecting, so countries in the world are the practical research of the lithium ion battery of positive electrode carrying out with spinel structure Li-Mn-O based material energetically all.
Li-Mn-O is that the traditional preparation method of positive electrode is the high temperature solid state reaction synthetic method, sol-gal process, coprecipitation, citric acid complex method, microwave process for synthesizing, fused salt infusion process etc.These methods respectively have its limitation.
Summary of the invention the object of the present invention is to provide that a kind of technology is easy, not need solvent, environmentally safe or Li-Mn-O of reduced contamination, that productive rate is high, energy consumption is low, applied widely be positive electrode one spinel structure LiCo in reaction
xMn
2-xO
4The preparation method of (0≤X≤0.2) anode material for lithium-ion batteries.The inventor finds that complexation reaction easily takes place for solid-state reactants and solid organic acid, thereby forms the complex of molecular level mixed-level that the further roasting of this complex can get the spinel-type LiCo of homogeneous in research complex course of reaction
xMn
2-xO
4(0≤X≤0.2) anode material for lithium-ion batteries.The present invention prepares LiCo
xMn
2-xO
4The method of (0≤X≤0.2) is that solid-state lithium salts, solid-state cobalt salt, solid-state manganese salt and the solid organic acid ratio by the amount of substance of certain reaction is mixed, and fully grinding promptly makes the mixed complex presoma.The roasting at a certain temperature of this presoma is promptly got anode material for lithium-ion batteries LiCo
xMn
2-xO
4(0≤X≤0.2).Method of the present invention is particularly useful for low hot preparation anode material for lithium-ion batteries.The present invention prepares LiCo
xMn
2-xO
4(0≤X≤0.2) is black powder, and it is spherical and by forming excellent trend, the about 10～50nm of particle diameter that this powder is class.Material electrochemical performance is better: LiMnO wherein
4Discharge capacity is 124.4mAh/g first; And LiCo
xMn
2-xO
4The first charge-discharge capacity is low slightly, but it charges and discharge cycle performance and obviously is better than LiMnO
4, if with prepared nanometer LiMnO
4LiMnO with conventional particle
4With certain proportion mix composite after, its first discharge capacity can reach 122.9mAh/g, circulate after 50 times discharge capacity 6.8% (with the C/3 multiplying power discharging) of only decaying.
Low-heat solid state reaction of the present invention prepares spinel-type LiCo
xMn
2-xO
4The method technology of (0≤X≤0.2) is simple, reaction does not need solvent, environmentally safe or of reduced contamination, sintering temperature is low, productive rate is high, applied widely.
Description of drawings Fig. 1 is prepared spinel-type LiMnO
4(a) and LiCo
xMn
2-xO
4(the transmission electron microscope photo of 0≤X≤0.2 (b).Fig. 2 is prepared spinel-type LiMnO
4(a) and LiCo
xMn
2-xO
4(0≤X≤0.2) discharge curve first (b).Fig. 3 is the nanometer spinel type LiMnO of preparation
4LiMnO with conventional particle
4The discharge cycles curve that mixes composite back (compound proportion is 1: 9).
Embodiment
(1) preparation of mixed complex presoma accurately takes by weighing lithium salts, cobalt salt, manganese salt and organic acid by stoichiometric proportion, levigate in mortar respectively, then these four kinds of materials are mixed, put into a mortar and continue to grind 1 hour, dry 6h promptly gets the mixed complex presoma in 90 ℃ drying box.
(2) spinel-type LiCo
xMn
2-xO
4The preparation of (0≤X≤0.2) 450 ℃ or 550 ℃ of following roastings 6 hours, promptly makes spinel-type LiCo with above-mentioned presoma
xMn
2-xO
4(0≤X≤0.2) anode material for lithium-ion batteries.
Claims (3)
1. a low-heat solid state reaction prepares spinel structure LiCo
xMn
2-xO
4The method of (0≤X≤0.2) anode material for lithium-ion batteries.Preparation LiCo
xMn
2-xO
4The feature of (0≤X≤0.2) is that solid-state lithium salts, cobalt salt, manganese salt are mixed with the ratio of solid organic acid with certain amount of substance, and fully grinding promptly makes the mixed complex presoma.The roasting at a certain temperature of this presoma is promptly made anode material for lithium-ion batteries LiCo
xMn
2-xO
4(0≤X≤0.2).
2. preparation spinel structure LiCo according to claim 1
xMn
2-xO
4The method of (0≤X≤0.2) anode material for lithium-ion batteries is characterized in that: full solid phase reaction, do not use solvent, and sintering temperature is low, and the gained material is a nanoscale, and material electrochemical performance is better: LiMnO wherein
4Discharge capacity is 124.4mAh/g first; LiCo
0.16Mn
1.84O
4Discharge capacity is 101.5mAh/g first, and with prepared nanometer LiMnO
4LiMnO with conventional particle
4Mix composite back (compound proportion is 1: 9), its first discharge capacity be 122.9mAh/g, circulate after 50 times discharge capacity 6.8% (with the C/3 multiplying power discharging) of only decaying.
3. according to the described preparation spinel structure of claim 1 LiCo
xMn
2-xO
4The method of (0≤X≤0.2) anode material for lithium-ion batteries is characterized in that: solid-state lithium salts is lithium acetate, lithium carbonate, lithium nitrate, lithium hydroxide; Solid-state cobalt salt is cobalt acetate, cobalt carbonate, cobalt nitrate; Solid-state manganese salt is manganese acetate, manganese carbonate, manganese dioxide; Solid organic acid is oxalic acid, adipic acid, ethanedioic acid, citric acid, tartaric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100069559A CN1805179A (en) | 2005-01-13 | 2005-01-13 | Preparation method of positive electrode material of lithium ion cell in spinel structure LiCoxMn2-XO4 (0<=X<=0.2) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100069559A CN1805179A (en) | 2005-01-13 | 2005-01-13 | Preparation method of positive electrode material of lithium ion cell in spinel structure LiCoxMn2-XO4 (0<=X<=0.2) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1805179A true CN1805179A (en) | 2006-07-19 |
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|---|---|---|---|
| CNA2005100069559A Pending CN1805179A (en) | 2005-01-13 | 2005-01-13 | Preparation method of positive electrode material of lithium ion cell in spinel structure LiCoxMn2-XO4 (0<=X<=0.2) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064754A (en) * | 2014-06-27 | 2014-09-24 | 胡莹 | Preparation method of lithium and manganese oxide |
-
2005
- 2005-01-13 CN CNA2005100069559A patent/CN1805179A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064754A (en) * | 2014-06-27 | 2014-09-24 | 胡莹 | Preparation method of lithium and manganese oxide |
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