Lithium cobaltate:a novel host material enables high-rate and stable lithium-sulfur batteries  

作　　者：Wen Ma Qing Xu 

机构地区：[1]GRINM Bohan (Beijing) Publisher Co.,Ltd.,GRINM Group Co.,Ltd. [2]Subinstitute of Standardization Theory and Strategy, China National Institute of Standardization

出　　处：《Rare Metals》2018年第11期929-935,共7页稀有金属（英文版）

摘　　要：Element sulfur is highly attractive due to their potentially low cost and environmental compatibility.However, polysulfides dissolution hinders the lithiumsulfur(Li-S) batteries toward commercialization. To overcome these issues, in this work, lithium cobaltate as a commercial material, for the first time, was devoted to engineering the electrode structure and composition to improve the performance. When incorporated with 80% sulfur powder, the synergetic effects of cobalt atoms and interlayer spaces effectively enable the production of Li-S batteries with a relatively high discharge capacity of 1420 mAh·g-1at the low surface current density of 1 mA·cm-2and stable capacity retention of 650 mAh·g-1at high surface current density of 6 mA·cm-2. The introduction of lithium cobaltate is a viable approach for successfully developing practical Li-S batteries.Element sulfur is highly attractive due to their potentially low cost and environmental compatibility.However, polysulfides dissolution hinders the lithiumsulfur(Li-S) batteries toward commercialization. To overcome these issues, in this work, lithium cobaltate as a commercial material, for the first time, was devoted to engineering the electrode structure and composition to improve the performance. When incorporated with 80% sulfur powder, the synergetic effects of cobalt atoms and interlayer spaces effectively enable the production of Li-S batteries with a relatively high discharge capacity of 1420 mAh·g^(-1) at the low surface current density of 1 mA·cm^(-2) and stable capacity retention of 650 mAh·g^(-1) at high surface current density of 6 mA·cm^(-2). The introduction of lithium cobaltate is a viable approach for successfully developing practical Li-S batteries.

关 键 词：Lithium cobaltate Polysulfides dissolution Electrochemical properties Lithium-sulfur batteries 

分 类 号：TQ131.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]