Application of Poly(3-hexylthiophene-2,5-diyl) as a Protective Coating for High Rate Cathode Materials,Chemistry of Materials

当前位置： X-MOL 学术 › Chem. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Application of Poly(3-hexylthiophene-2,5-diyl) as a Protective Coating for High Rate Cathode Materials
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-04-03 00:00:00 , DOI: 10.1021/acs.chemmater.7b05116
Chun-Han Lai ₁ , David S. Ashby ₁ , Terri C. Lin ₂ , Jonathan Lau ₁ , Andrew Dawson ₂ , Sarah H. Tolbert _{1,

3} , Bruce S. Dunn _{1,

3}

Affiliation

Poly(3-hexylthiophene-2,5-diyl) (P3HT), a conducting polymer studied extensively for its optoelectronic devices, offers a number of advantageous properties when used as a conductive binder for lithium-ion battery cathode materials. By mixing with carbon nanotubes (CNT), P3HT-CNT serves as a surface coating for the cathode material LiNi_0.8Co_0.15Al_0.05O₂ (NCA). Oxidation of the P3HT enables high electronic and ionic conductivity to be achieved over the potential range where the NCA is electrochemically active. In addition to the conductivity benefits from electrochemical doping, the P3HT-CNT coating suppresses electrolyte breakdown, thus inhibiting growth of the solid electrolyte interphase layer and preventing intergranular cracking in the NCA particles. The use of the P3HT-CNT binder system leads to improved cycling for NCA at high power density with capacities of 80 mAh g^–1 obtained after 1000 cycles at 16 C, a value that is 4 times greater than that achieved in the control electrode.

中文翻译：

聚（3-己基噻吩-2,5-二基）作为高倍率阴极材料保护涂层的应用

聚（3-己基噻吩-2,5-二基）（P3HT）是一种广泛研究用于其光电器件的导电聚合物，当用作锂离子电池正极材料的导电粘合剂时，具有许多优势。通过与碳纳米管（CNT）混合，P3HT-CNT用作正极材料LiNi _0.8 Co _0.15 Al _0.05 O ₂的表面涂层（NCA）。P3HT的氧化可在NCA具有电化学活性的电势范围内实现高电子和离子电导率。P3HT-CNT涂层不仅具有电化学掺杂带来的导电性，而且还抑制了电解质的分解，从而抑制了固体电解质中间相层的生长，并防止了NCA颗粒的晶间开裂。使用P3HT-CNT粘合剂系统可改善NCA在高功率密度下的循环，在16 C下1000次循环后可获得80 mAh g ^–1的容量，该值比对照电极大4倍。

更新日期：2018-04-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11