A Novel Strategy to Suppress Capacity and Voltage Fading of Li‐ and Mn‐Rich Layered Oxide Cathode Material for Lithium‐Ion Batteries |
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| Authors: | Shiming Zhang Haitao Gu Hongge Pan Suhui Yang Wubin Du Xiang Li Mingxia Gao Yongfeng Liu Min Zhu Liuzhang Ouyang Dechao Jian Feng Pan |
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| Institution: | 1. State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province & School of Materials Science and Engineering, Zhejiang University, Hangzhou, P. R. China;2. Shanghai Institute of Space Power‐Sources, Shanghai, P. R. China;3. School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou, P. R. China;4. School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, P. R. China |
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| Abstract: | Poor cycling stability is one of the key scientific issues needing to be solved for Li‐ and Mn‐rich layered oxide cathode. In this paper, sodium carboxymethyl cellulose (CMC) is first used as a novel binder in Li1.2Ni0.13Co0.13Mn0.54O2 cathode to enhance its cycling stability. Electrochemical performance is conducted by galvanostatic charge and discharge. Structure and morphology are characterized by X‐ray diffraction, scanning electronic microscopy, high‐resolution transmission electron microscopy, and X‐ray photoelectron spectroscopy. Results reveal that the CMC as binder can not only stabilize the electrode structure by preventing the electrode materials to detach from the current collector but also suppress the voltage fading of the Li1.2Ni0.13Co0.13Mn0.54O2 cathode due to Na+ ions doping. Most importantly, the dissolution of metal elements from the cathode materials into the electrolyte is also inhibited. |
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| Keywords: | capacity fading Li‐ and Mn‐rich layered oxide cathode materials lithium‐ion batteries sodium carboxymethyl cellulose voltage fading |
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