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Abstract
The elemental sulfur as an active cathode material in lithium sulfur batteries possess a high theoretical energy density of 2600 Wh/kg, which is 5~6 times higher than that of traditional Li-ion batteries. Thus, the use of lithium sulfur batteries can significantly prolong the endurance mileage of electric cars and working time of electronic products. However, lithium sulfur batteries are suffering from the dissolution of polysulfide in the electrolyte during charging and discharging process, which can cause dramatic loss of active materials in the cathode. In order to suppress the problem of polysulfide dissolution, strategies such as porous modification and polarization were applied to increase the sulfiphilicity of cathode host. The biomass fibers are natural nanomaterial source to obtain cathode host materials which typically possess natural abundant hierarchical pores and heteroatoms. The porosity and heteroatom doping properties of biomass fiber derived host materials can be used to trap polysulfide via chemical and physical adsorption in cathode. The application of such materials in cathode are beneficial for slowing down the decay rate of cycling stability in lithium sulfur batteries. This review provides an overview and discussion on the application, working mechanism, problems and prospects of the biomass fibers derived cathode host for lithium sulfur batteries.
Keywords
biomass fiber
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lithium sulfur battery
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carbon fiber
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cathode material
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polysulfide
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Wenchen Ren, Zhihua Cui, Wentao Wang, Bingtao Tang.
Application of Biomass Fiber Derived Carbon in Cathode for Lithium Sulfur Batteries.
Progress in Chemistry DOI:10.7536/PC200629
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