文献类型：期刊文献

英文题名：Liquid-Phase Exfoliated Few-Layer Iodine Nanosheets for High-Rate Lithium-Iodine Batteries

作者：Kuang, Chengwei[1];Zeng, Wen[1];Qian, Mengmeng[2];Liu, Xiaoyu[3]

第一作者：Kuang, Chengwei

通讯作者：Zeng, W[1];Liu, XY[2]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400030, Peoples R China;[2]Beijing Inst Technol, Sch Mat Sci & Engn, Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China;[3]Beijing Union Univ, Coll Appl Sci & Technol, Beijing 100012, Peoples R China

第一机构：Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400030, Peoples R China

通讯机构：[1]corresponding author), Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400030, Peoples R China;[2]corresponding author), Beijing Union Univ, Coll Appl Sci & Technol, Beijing 100012, Peoples R China.|[1141775]北京联合大学应用科技学院;[11417]北京联合大学;

年份：2021

卷号：86

期号：6

起止页码：865-869

外文期刊名：CHEMPLUSCHEM

收录：;Scopus(收录号：2-s2.0-85108036087);WOS:【SCI-EXPANDED(收录号:WOS:000674289400014)】；

基金：This work was financially supported by the R&D Program of Beijing Municipal Education Commission (KM201911417004), the Fundamental Research Funds for the Central Universities (No.2019CDJGFCL001 and 2020CDCGJ001) and the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No.KJZD‐K201800101).

语种：英文

外文关键词：batteries; cathode materials; graphene; iodine; lithium

摘要：Rechargeable lithium-iodine (Li-iodine) batteries attract significant attention owning to their high energy density, wide abundance and low cost of iodine resources. However, iodine suffers from low electrical conductivity and high solubility in aprotic electrolyte, leading to fast capacity degradation, low columbic efficiency, as well as poor rate capability. Herein, we propose a simple method for the large-scale production of two-dimensional (2D) few-layer iodine nanosheets (FLINs) via liquid-phase exfoliation of iodine in deionized water. 2D FLINs could effectively improve rate capability by providing sufficient active sites and shortening the Li ion diffusion path. Meanwhile, graphene oxide (GO)@carbon nanotubes (CNT) hosts are designed to suppress the dissolution of iodine and enhance the electrical conductivity. GO@CNT@FLINs film exhibits excellent rate capability (220 mAh g(-1) at 0.2 A g(-1) and 96 mAh g(-1) at 8 A g(-1)) and outstanding cycle stability (93.2 mAh g(-1) at 2 A g(-1) after 1000 cycles) for lithium storage due to the synergistic effects of GO@CNT hosts and 2D structure of FLINs. The controllable synthesis of FLINs provides a bright prospect for achieving high rate capability of Li-iodine batteries and is of utmost importance to potential large-scale applications.