文献类型：期刊文献

英文题名：Adenine Derivative Host with Interlaced 2D Structure and Dual Lithiophilic-Sulfiphilic Sites to Enable High-Loading Li-S Batteries

作者：Wu, Qingping[1,2];Zhou, Xuejun[1];Xu, Jun[2];Cao, Fahai[2];Li, Chilin[1]

机构：[1]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 585 He Shuo Rd, Shanghai 201899, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：13

期号：8

起止页码：9520

外文期刊名：ACS NANO

收录：;EI(收录号：20193407324621);WOS:【SCI-EXPANDED(收录号:WOS:000484077800103)】；

基金：This work was supported by the National Key R&D Program of China (2016YFB0901600), National Natural Science Foundation of China (51772313, U1830113, and 51802334), and Shanghai Science and Technology Committee (16DZ2270100).

语种：英文

外文关键词：adenine derivative host; interlaced 2D structure; Co/N-codoped carbon; lithiophilic-sulfiphilic sites; high-loading Li-S batteries

摘要：How to simultaneously restrain the loss of active species and facilitate the conversion reaction under high S loading condition is the key to solve the commercialization of Li-S batteries. For this system, the availability of raw materials and simplicity (high efficiency) of synthetic strategies are also important factors. Herein, we propose an interlaced two-dimensional (2D) carbon material as advanced Li-S cathode host characterized by corrugated monolithic morphology and Co/N dopants as dual lithiophilic-sulfiphilic sites. This 2D structure is derived from a cheap biomass precursor, adenine, with bonding interaction with a MgCl2 hydrate template via a facile ionothermal method. It allows a homogeneous spatial distribution of S/Li2S deposits and strong adsorbability and enhanced conversion from the synergistic effects of corrugated 2D conductive matrix and embedded heteroatom/nanodot catalyst, the resultant sulfur cathode releases a high specific capacity of 1290.4 mA h g(-1) at 0.2 C, small capacity fading rate of 0.029% per cycle over 600 cycles at 2 C, superior rate performance up to 20 C, and considerable areal capacity retention of 6.0 mA h cm(-2) even under an ultrahigh sulfur loading up to 9.7 mg cm(-2).