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- 2015
锂硫电池硫碳复合正极材料研究现状及展望
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Abstract:
摘要 二次锂硫电池被视为最具有发展潜力的下一代高能量密度二次电池之一. 但由于正极硫的电导率低（5×10-30 S·cm-1），且在放电过程中产生的中间体多硫化物易溶于有机电解液，致使锂硫电池活性物质利用率降低，溶解后的多硫化物还会迁移到负极，被还原成不溶物Li2S2/Li2S而沉积于负极锂，使电极结构遭受破坏，造成电池容量大幅衰减，循环性能差，从而限制了进一步的开发应用. 研究表明，以碳作为导电骨架的硫碳复合正极材料能在不同程度上解决上述问题，从而有效提高了锂硫电池的放电容量和循环性能. 本文综述了近年来国内外报道的各种锂硫电池正极材料的研究进展，结合作者课题组的研究，重点探讨了硫碳复合正极材料，并对其今后的发展趋势进行了展望
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