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A Novel Strategy to Suppress Capacity and Voltage Fading of Li‐ and Mn‐Rich Layered Oxide Cathode Material for Lithium‐Ion Batteries
Author(s) -
Zhang Shiming,
Gu Haitao,
Pan Hongge,
Yang Suhui,
Du Wubin,
Li Xiang,
Gao Mingxia,
Liu Yongfeng,
Zhu Min,
Ouyang Liuzhang,
Jian Dechao,
Pan Feng
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201601066
Subject(s) - materials science , cathode , x ray photoelectron spectroscopy , electrolyte , lithium (medication) , electrochemistry , oxide , scanning electron microscope , dissolution , chemical engineering , electrode , transmission electron microscopy , analytical chemistry (journal) , nanotechnology , composite material , metallurgy , chemistry , medicine , engineering , endocrinology , chromatography
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 Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 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 Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 cathode due to Na + ions doping. Most importantly, the dissolution of metal elements from the cathode materials into the electrolyte is also inhibited.