Patent
Preparation method of LiMn2O4-graphene composite positive electrode material
Chen Da,Dongfang Wang,Guangxing Ping,Meiqiang Fan,Qin Laishun,Lyu Chunju,Tian Guanglei,Shu Kangying,Ge Qisheng,Shi Lei +9 more
- 16 Apr 2014
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TL;DR: Li et al. as discussed by the authors proposed a preparation method for improving cycle performance of a LiMnO2 lithium ion battery positive electrode material by use of graphene, which is simple in steps, and low in cost.
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Abstract: The invention discloses a preparation method for improving cycle performance of a LiMnO2 lithium ion battery positive electrode material by use of graphene. The LiMn2O4-graphene composite positive electrode material is prepared through simply ball-milling graphene and LiMn2O4. Compared with the LiMn2O4 material, the LiMnO2 lithium ion battery positive electrode material has the advantages that because of a three-dimensional conductive frame formed by the graphene, the agglomeration of LiMn2O4 particles is relieved, the volume change of the LiMn2O4 material due to intercalation and deintercalation of Li can be adapted, the intercalation and deintercalation and the charge transfer speed are also increased, and the cyclic performance of the LiMnO2 positive electrode material is more greatly improved. The preparation method is simple in steps, and low in cost; the obtained LiMnO2-graphene positive electrode material is better in conductivity and charge transfer speed than those of the LiMn2O4 material, shows more excellent cyclic performance of a lithium ion battery, and is expected to be popularized and applied in the industrial field of lithium ion batteries.
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Citations
Patent
Composite positive electrode material and preparation method therefor
Yanli Zhang,Wang Li,He Xiangming,Peng Zhao,Jin Yuhong,Li Jianjun,Shang Yuming,Gao Jian +7 more
- 14 Jan 2015
TL;DR: In this article, a composite positive electrode material is proposed, which is a graphene-FeOF composite material, and comprises FeOF particles and graphene which are combined by virtue of chemical bonds.
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Patent
Spinel-type lithium ion battery positive active material as well as preparation method thereof, positive pole piece and lithium ion battery
Weiwei Sun,Chunman Zheng,Kai Xie,Yujie Li,Luo Shiqiang +4 more
- 01 Mar 2019
TL;DR: In this paper, a spinel-type lithium ion battery positive active material as well as preparation method thereof, a positive pole piece and a lithium battery are disclosed. But the preparation method of the positive active materials comprises the following steps: adopting PS microspheres as a template, growing MnO2 nanosheets on the surfaces of the PS micro-spheres, doping Li and/or Ni by virtue of a solvent evaporation method, and performing the high-temperature sintering, thus obtaining the spinel type lithiumion battery positive activative material.
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References
Patent
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Liu Hao,Yi Zhang,Mei Jun,Zehua Zhu,Liu Huanming,Huang Jiawei +5 more
- 08 May 2013
TL;DR: In this paper, a method for compounding graphene and a metallic oxide/metallic compound was proposed, in which a reducing agent was not used, and the composite material was reduced by utilizing the reducing property of graphene oxide in a hydrothermal environment.
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Patent
Graphene-Li(NixCoyMnz)O2 compound electrode material of lithium ion battery and preparation method of graphene-Li(NixCoyMnz)O2 compound electrode material
Tan Qiangqiang,Duan Hui +1 more
- 23 Jan 2013
TL;DR: In this article, a method for the preparation of a graphene-Li(NixCoyMnz)O2 compound electrode material of a lithium ion battery was proposed, in which the original conduction agent was replaced by the addition of the graphene, the conductivity of the Li(nixcoymnz) O2 compound material was improved, and a support pole was played for the structure of the ternary material, therefore, the multiplying power property and circulating stability were improved.
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Patent
Electrode with grapheme as conductive additive and application thereof in lithium ion battery
Xuecheng Chen,Yanbing He,Wei Lu,Quanhong Yang,Conghui You +4 more
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TL;DR: In this article, an electrode with grapheme as conductive additive and application in a lithium ion battery was proposed, which significantly improved the high power charge and discharge properties of the battery.
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Patent
Preparation method of graphene-containing lithium manganate positive pole piece
Sun Mingjuan,Jing Mengmeng,Hou Shifeng +2 more
- 27 Nov 2013
TL;DR: In this paper, a graphene-containing lithium manganate positive pole piece is formed by applying a coating material on an aluminum foil surface, which is composed of the following components in percentage by weight: 75-94% of positive pole material, 1-15% of conducting agent and 5-10% of binding agent.
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