用于高性能有机自由基锂离子电池的阳极材料——电致变色聚（硫属元素紫精）
Electrochromic Poly(chalcogenoviologen)s as Anode Materials for High-Performance Organic Radical Lithium-Ion Batteries.
作者信息
Li Guoping, Zhang Bingjie, Wang Jianwei, Zhao Hongyang, Ma Wenqiang, Xu Letian, Zhang Weidong, Zhou Kun, Du Yaping, He Gang
机构信息
Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China.
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.
出版信息
Angew Chem Int Ed Engl. 2019 Jun 17;58(25):8468-8473. doi: 10.1002/anie.201903152. Epub 2019 May 16.
A series of electrochromic electron-accepting poly(chalcogenoviologen)s with multiple, stable, and reversible redox centers were used as anodic materials in organic radical lithium-ion batteries (ORLIBs). The introduction of heavy atoms (S, Se, and Te) into the viologen scaffold significantly improved the capacity and cycling stability of the ORLIBs. Notably, the poly(Te-BnV) anode was able to intercalate 20 Li ions and showed higher conductivity and insolubility in the electrolyte, thus contributing to a reversible capacity of 502 mAh g at 100 mA g when the Coulombic efficiency approached 100 %. The charged/discharged state of flexible electrochromic batteries fabricated from these anodic materials could be monitored visually owing to the unique electrochromic and redox properties of the materials. This study opens a promising avenue for the development of organic polymer-based electrodes for flexible hybrid visual electronics.
一系列具有多个稳定且可逆氧化还原中心的电致变色电子接受型聚（硫族代紫精）被用作有机自由基锂离子电池（ORLIBs）的阳极材料。将重原子（S、Se和Te）引入紫精支架显著提高了ORLIBs的容量和循环稳定性。值得注意的是，聚（Te-BnV）阳极能够嵌入20个锂离子，并且在电解质中表现出更高的导电性和不溶性，因此当库仑效率接近100%时，在100 mA g下可逆容量达到502 mAh g。由于这些材料独特的电致变色和氧化还原特性，由这些阳极材料制成的柔性电致变色电池的充电/放电状态可以通过视觉监测。这项研究为开发用于柔性混合视觉电子器件的有机聚合物基电极开辟了一条有前景的途径。
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