Carboxymethyl chitosan/poly(ethylene oxide) water soluble binder:Challenging application for 5V LiNi0.5Mn1.5O4 cathode

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 763-767
• 页数: 5页
• 语种: 英文

摘要

Carboxymethyl chitosan/poly (ethylene oxide) (CCTS/PEO) composite is firstly reported as a water soluble binder for the application of 5V LiNi0.sMn1.5O4 cathode in Li-ion batteries.Both CCTS and PEO show a high electrochemical oxidation potential of above 5.0 V (vs.Li/Li+).The electrochemical performances of LiNi0.5 Mn1.5 O4 (LNMO) cathodes with CCTS/PEO composite binders of different mass rates are investigated,it is found that LiNi0.5Mn1.5O4 cathode with an optimized CCTS/PEO (85/15,w/w) composite exhibits a slightly better cycling performance than that of polyvinylidene fluoride (PVDF),retaining 81.4％ capacity as compared with 79.8％ for PVDF at 0.5C rate after 200 cycles.LNMO with PEO/CCTS (85/15,w/w) exhibited the better rate capability than that of PVDF.These results demonstrate that CCTS/PEO composite can be potentially used as a water-soluble binder for 5 V LNMO cathode.