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Nafion/Titanium Dioxide‐Coated Lithium Anode for Stable Lithium–Sulfur Batteries
Author(s) -
Jiang Shuang,
Lu Yong,
Lu Yanying,
Han Mo,
Li Haixia,
Tao Zhanliang,
Niu Zhiqiang,
Chen Jun
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800326
Subject(s) - anode , polysulfide , materials science , nafion , lithium (medication) , chemical engineering , inorganic chemistry , electrochemistry , chemistry , electrolyte , electrode , endocrinology , medicine , engineering
Lithium–sulfur (Li–S) batteries have shown great potential as high energy‐storage devices. However, the stability of the Li metal anode is still a major concern. This is due to the formation of lithium dendrites and severe side reactions with polysulfide intermediates. We herein develop an anode protection method by coating a Nafion/TiO 2 composite layer on the Li anode to solve these problems. In this architecture, Nafion suppresses the growth of Li dendrites, protects the Li anode, and prevents side reactions between polysulfides and the Li anode. Moreover, doped TiO 2 further improves the ionic conductivity and mechanical properties of the Nafion membrane. Li–S batteries with a Nafion/TiO 2 ‐coated Li anode exhibit better cycling stability (776 mA h g −1 after 100 cycles at 0.2 C, 1 C=1672 mA g −1 ) and higher rate performance (787 mA h g −1 at 2 C) than those with a pristine Li anode. This work provides an alternative way to construct stable Li anodes for high‐performance Li–S batteries.