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首页> 外文期刊>ChemElectroChem >Interwoven NiCo2O4 Nanosheet/Carbon Nanotube Composites as Highly Efficient Lithium-Sulfur Cathode Hosts
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Interwoven NiCo2O4 Nanosheet/Carbon Nanotube Composites as Highly Efficient Lithium-Sulfur Cathode Hosts

机译：交织Nico2O4纳米片/碳纳米管复合材料作为高效锂 - 硫磺阴极主体

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摘要

Lithium-sulfur (Li-S) batteries are one of the most promising candidates for the next generation of rechargeable battery systems, because of their high energy density and cost effectiveness. But, their commercialized applications are hindered by fast capacity fading and poor cycling stability. In this work, sulfur hosts based on interwoven NiCo2O4 nanosheet/carbon nanotube composites are designed and synthesized by using a solvothermal reaction and subsequent annealing. In this unique material architecture, the carbon nanotubes construct a porous conductive network across the NiCo2O4 nanosheets to provide fast electron paths. In addition, the NiCo2O4 nanosheets can chemically bind polysulfides to restrain their diffusion into electrolyte. As a result, the Li-S batteries based on this sulfur host exhibit high specific capacity, excellent cycling stability, and good rate capability. Reversible specific capacities of 1311 and 575 mAhg(-1) are achieved at rates of 0.1 and 2 C, respectively, together with an excellent cycling stability of 0.038% capacity decay per cycle over 1200 cycles at 0.5 C.
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