Stable immobilization of lithium polysulfides using three-dimensional ordered mesoporous Mn_(2)O_(3) as the host material in lithium-sulfur batteries  

作　　者：Sung Joon Park Yun Jeong Choi Hyun-seung Kim Min Joo Hong Hongjun Chang Janghyuk Moon Young-Jun Kim Junyoung Mun Ki Jae Kim 

机构地区：[1]Department of Energy Science,Sungkyunkwan University,Suwon,Gyeonggi-do,Republic of Korea [2]Department of Energy Engineering,Konkuk University,Seoul,Republic of Korea [3]Advanced Batteries Research Center,Korea Electronic Technology Institute,Seongnam,Republic of Korea [4]Department of Future Energy Engineering,Sungkyunkwan University,Suwon,Republic of Korea [5]Department of Energy Systems Engineering,Chung-Ang University,Seoul,Republic of Korea [6]SKKU Advanced Institute of Nanotechnology,Sungkyunkwan University,Suwon,Gyeonggi-do,Republic of Korea [7]SKKU Institute of Energy Science and Technology(SIEST),Sungkyunkwan University,Suwon,Republic of Korea [8]School of Advanced Materials Science and Engineering,Sungkyunkwan University,Suwon,Republic of Korea

出　　处：《Carbon Energy》2024年第6期99-112,共14页碳能源（英文）

基　　金：Ministry of Trade,Industry and Energy,Grant/Award Number:20010095;Korea Evaluation Institute of Industrial Technology,Grant/Award Number:20012341。

摘　　要：Lithium-sulfur batteries(LSBs)have drawn significant attention owing to their high theoretical discharge capacity and energy density.However,the dissolution of long-chain polysulfides into the electrolyte during the charge and discharge process(“shuttle effect”)results in fast capacity fading and inferior electrochemical performance.In this study,Mn_(2)O_(3)with an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cathode host for LSBs via KIT-6 hard templating,to effectively inhibit the polysulfide shuttle effect.OM-Mn_(2)O_(3)offers numerous pores to confine sulfur and tightly anchor the dissolved polysulfides through the combined effects of strong polar-polar interactions,polysulfides,and sulfur chain catenation.The OM-Mn_(2)O_(3)/S composite electrode delivered a discharge capacity of 561 mAh g^(-1) after 250 cycles at 0.5 C owing to the excellent performance of OM-Mn_(2)O_(3).Furthermore,it retained a discharge capacity of 628mA h g^(-1) even at a rate of 2 C,which was significantly higher than that of a pristine sulfur electrode(206mA h g^(-1)).These findings provide a prospective strategy for designing cathode materials for high-performance LSBs.

关 键 词：host material lithium-sulfur battery ordered mesoporous structure shuttle effect transition-metal oxides 

分 类 号：TM912[电气工程—电力电子与电力传动]