阳极
金红石
分离器(采油)
石墨烯
材料科学
电化学
储能
锂(药物)
碳纤维
纳米技术
化学工程
电极
复合材料
化学
复合数
热力学
物理
工程类
内分泌学
物理化学
功率(物理)
医学
量子力学
作者
Shuang Xia,Wen Huang,Wei-Yong Yan,Xingxing Yuan,Xi Chen,Huan Liu,Lijun Fu,Yusong Zhu,Qinhong Huang,Yuping Wu,Teunis van Ree,Rudolf Holze
标识
DOI:10.1002/celc.202200301
摘要
Abstract As an advanced energy‐storage system, Li−S batteries have attracted much attention, but there is still a series of problems hindering their commercialization, such as the ‘shuttle effect’ and corrosion of lithium anodes. To alleviate these two important problems simultaneously, we modified the separators with spherical rutile TiO 2 with oxygen vacancies (abbreviated OT) and three‐dimensional interconnected graphene‐like carbon (abbreviated GC) for advanced Li−S batteries to improve the electrochemical performance. The modified separators (abbreviation OTCD) have low charge transfer impedance, a catalytic effect on polysulfides, and a barrier effect on polysulfides, which can suppress the ‘shuttle effect’ and prevents the corrosion of lithium anodes in Li−S batteries. The as‐prepared Li−S batteries show good cycling stability for 250 cycles with 0.048 % capacity decay per cycle at 1 C. Moreover, the SEM images of lithium anodes after 50 cycles showed that the lithium anodes were uncorroded. This work provides a practical and effective reference for the advanced Li−S batteries.
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