松香
材料科学
复合材料
石墨
电极
硅
聚合物
丙烯酸
共聚物
化学工程
树脂酸
化学
冶金
工程类
物理化学
作者
Soo Jung Choi,Taeeun Yim,Woosuk Cho,Junyoung Mun,Yong Nam Jo,Ki Jae Kim,Goojin Jeong,Tae‐Hyun Kim,Young‐Jun Kim
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2016-09-20
卷期号:4 (12): 6362-6370
被引量:23
标识
DOI:10.1021/acssuschemeng.6b00920
摘要
We propose the use of a rosin-embedded poly(acrylic acid) binder, PAA-Rosin, to improve the cycling performance of silicon/graphite composites in lithium-ion batteries. Rosin, which is a natural product derived from pine trees, is chemically bonded with a rigid PAA polymer, which affords additional adhesion and elasticity of the PAA backbone, resulting in an effective binder with optimal properties. The hybridization of PAA-Rosin is achieved through an efficient one-step process, and the chemical structures of the components are systematically confirmed. In terms of the cycling performance, the cell based on PAA-Rosin shows excellent specific capacity retention (65.2%) with superior utilization of silicon/graphite composites even after 200 cycles. In addition, the PAA-Rosin electrode exhibits excellent specific capacity as well as remarkable capacity retention in bending tests. We demonstrate that the remarkable electrochemical characteristics of PAA-Rosin can be attributed to improved electrode uniformity, which results in the electronic networks remaining intact and minimizes electrode fatigue related to internal crack formation, delamination, and pulverization.
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