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Sulfur nanodots as MoS2 antiblocking agent for stable sodium ion battery anodes†
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2018-05-10 00:00:00 , DOI: 10.1039/c8ta02339e
Zhanwei Xu 1, 2, 3, 4 , Kai Yao 1, 2, 3, 4 , Zhi Li 5, 6, 7, 8 , Licai Fu 4, 9, 10, 11 , Hao Fu 1, 2, 3, 4 , Jia Li 4, 9, 10, 11 , Liyun Cao 1, 2, 3, 4 , Jianfeng Huang 1, 2, 3, 4
Affiliation  

MoS2 possessing a layered structure with d-space around 0.62 nm is a promising anode material for sodium ion batteries (SIBs), presenting an attractively high theoretical capacity. However, poor cycle stability due to stacking is one of its main challenges. In this work, sulfur nanodots are employed as an efficient antiblocking agent of MoS2 sheets (S/MoS2). The S/MoS2 nanoarchitectures, constructed using few-layered MoS2 with deposited sulfur nanodots (∼10 nm), are facilely synthesized in a horizontal tube furnace with two temperature-controlled zones. Employed as SIB anode material, the S/MoS2 architectures deliver a high reversible capacity of 497.6 mA h g−1 at 100 mA g−1, remaining at 413.2 mA h g−1 over 100 cycles. Moreover, the architectures exhibit a capacity of 358.8 mA h g−1 at a higher current density of 500 mA g−1 with excellent cycling stability, surviving 300 full charge/discharge cycles with a retention of 83.8%

中文翻译:

硫纳米点作为MoS 2防粘剂,用于稳定的钠离子电池阳极

具有d空间约为0.62 nm的分层结构的MoS 2是钠离子电池(SIB)的有希望的阳极材料,具有诱人的高理论容量。然而,由于堆叠而导致的差的循环稳定性是其主要挑战之一。在这项工作中,硫纳米点被用作MoS 2薄板(S / MoS 2)的有效防粘剂。在S / MOS 2个nanoarchitectures,使用几个分层构成的MoS 2与沉积的硫纳米点(约10纳米),被轻便在水平管式炉中合成的具有两个温度控制区。S / MoS 2被用作SIB阳极材料架构在100 mA g -1时可提供497.6 mA hg -1的高可逆容量,在100个周期内保持在413.2 mA hg -1。此外,该架构在500 mA g -1的较高电流密度下显示358.8 mA hg -1的容量,具有出色的循环稳定性,可经受300个完整的充电/放电循环,保持率达83.8%。
更新日期:2018-05-10
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