A Novel Strategy to Suppress Capacity and Voltage Fading of Li‐ and Mn‐Rich Layered Oxide Cathode Material for Lithium‐Ion Batteries. Issue 6 (16th November 2016)

• Record Type: Journal Article
• Authors: Zhang, Shiming; Gu, Haitao; Pan, Hongge; Yang, Suhui; Du, Wubin; Li, Xiang; Gao, Mingxia; Liu, Yongfeng; Zhu, Min; Ouyang, Liuzhang; Jian, Dechao; Pan, Feng
• Is Part Of: Advanced energy materials. Volume 7:Issue 6(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-11-16
• Subjects: capacity fading -- Li‐ and Mn‐rich layered oxide cathode materials -- lithium‐ion batteries -- sodium carboxymethyl cellulose -- voltage fading; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201601066
• Languages: English
• ISSNs: 1614-6832

Abstract

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 Li1.2 Ni0.13 Co0.13 Mn0.54 O2 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 Li1.2 Ni0.13 Co0.13 Mn0.54 O2 cathode due to Na + ions doping. Most importantly, the dissolution of metal elements from the cathode materials into the electrolyte is also inhibited. Abstract : Sodium carboxymethyl cellulose (CMC) is used as the binder of Li1.2 Ni0.13 Co0.13 Mn0.54 O2 cathode for lithium‐ion batteries. It can drastically suppress the capacity and voltage fading of the cathode due to its higher stickiness and the exchange of the Na + ions in the CMC with the Li + ions in the cathode, which can significantly stabilize its crystal structure.