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High-content of sulfur uniformly embedded in mesoporous carbon: a new electrodeposition synthesis and an outstanding lithium–sulfur battery cathode
- Zhang, Liyuan, Huang, Hui, Xia, Yang, Liang, Chu, Zhang, Wenkui, Luo, Jianmin, Gan, Yongping, Zhang, Jun, Tao, Xinyong, Fan, Hong Jin
- Journal of materials chemistry A 2017 v.5 no.12 pp. 5905-5911
- batteries, carbon, cathodes, chemical bonding, commercialization, electrochemistry, porous media, sulfur
- We report a novel synthesis of a mesoporous carbon–sulfur composite (MCSC) by electrodeposition of sulfur into the mesopores via a self-limiting process. With the merits of a high sulfur content (77%), uniform distribution and strong C–S bonds achieved by this method, the as-prepared materials demonstrate excellent performance in lithium–sulfur batteries. The electrode delivers high specific capacities at various C-rates (e.g. about 1160 and 590 mA h g⁻¹ at current densities of 0.1 and 2.0 A g⁻¹, respectively) and remarkable capacity retention, remaining above 857 mA h g⁻¹ after 200 cycles at a high rate of 0.5 A g⁻¹. This electrochemical strategy is industrially viable and scalable, and thus may pave a new way to push the commercialization of Li–S batteries.