Dense MoS(2)Micro-Flowers Planting on Biomass-Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes
Dense MoS(2)Micro-Flowers Planting on Biomass-Derived Carbon Fiber Network for Multifunctional Sulfur Cathodes
复制标题
生物质衍生碳纤维网络上种植致密MoS(2)微花用于多功能硫阴极
DOI：
10.1002/slct.202001729
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发表时间：
2020
期刊：
影响因子：
2.1
通讯作者：
Zhaoliang Zhang
中科院分区：
文献类型：
--
作者：
Rameez Razaq;Nana Zhang;Ying Xin;Qian Li;Jin Wang;Zhaoliang Zhang
The significant challenge in lithium‐sulfur batteries (LSBs) arises from low conductivity of sulfur cathode, loss of active sulfur species due to less anchoring sites and sluggish redox kinetics of lithium polysulfides (LPSs). Herein, the dense MoS2micro‐flowers assembled by cross‐linked 2D MoS2nanoflakes planting on biomass‐derived carbon fiber (CF) network (MoS2/CFs) are fabricated as multifunctional sulfur cathodes of LSBs. The 2D MoS2nanoflakes supported on CF provide abundant anchoring sites for strong adsorption, while the 3D flowerlike structure prevents lamellar aggregation of 2D MoS2nanoflakes. Importantly, the dense MoS2micro‐flowers planting on the network weaved by biomass‐derived CFs ensures the high electronic conductivity of the MoS2/CFs composite, sufficient electrode/electrolyte interaction, fast electron and Li+transportation. Moreover, the CF network weaved from cost‐effective tissue paper reduces the cost of LSBs. Thus, the S‐MoS2/CFs cathode exhibits a high rate capability (1149 and 608 mA h g−1are obtained at 0.2 C and 4 C, respectively), excellent cyclic performance with ∼75% capacity retention and 99% Coulombic efficiency at 2 C after 500 cycles, corresponding to ∼0.05% capacity fading per cycle only, as well as structure integrity during the discharge/charge process.
