Program in Nano Science and Technology, Graduate School of Convergence Science and Technology , Seoul National University , 145 Gwanggyo-ro , Yeongtong-gu, Suwon-si , Gyeonggi-do 443-270 , Republic of Korea.
Advanced Institutes of Convergence Technology , 145 Gwanggyo-ro , Yeongtong-gu, Suwon-si , Gyeonggi-do 443-270 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 Aug 8;10(31):26485-26493. doi: 10.1021/acsami.8b00925. Epub 2018 Jul 24.
P, O, and N heteroatom-doped hollow carbon on graphene (PONHC/G) from nanosized LiFePO (LFP) as a hard template is shown to be a very efficient sulfur host for lithium-sulfur (Li-S) batteries. The PONHC/G made from LFP nanoparticles as hard materials provides sufficient voids with various pore sizes for sulfur storage, and doping of the carbon structures with various heteroatoms minimized dissolution/diffusion of the polysulfides. The obtained PONHC/G can store sulfur and mitigate diffusion of the dissolved polysulfide owing to the well-organized host structure and the strong chemical affinity for polysulfides because of the polarization effect of the heteroatom dopants. As a cathode, S@PONHC/G shows excellent cycle stability and rate capability, as confirmed by polysulfide adsorption analysis. Therefore, PONHC/G may show high potential as a sulfur scaffold in the commercialization of Li-S batteries through additional modification and optimization of these host materials.
以纳米 LiFePO（LFP）为硬模板制备的 P、O 和 N 杂原子掺杂空心碳负载在石墨烯上（PONHC/G），作为一种非常有效的锂硫（Li-S）电池硫宿主。由 LFP 纳米颗粒作为硬材料制成的 PONHC/G 提供了具有各种孔径的足够空隙用于硫储存，并且掺杂各种杂原子的碳结构可以最大限度地减少多硫化物的溶解/扩散。由于具有良好组织的主体结构和杂原子掺杂剂的极化效应，对多硫化物的强化学亲和力，所获得的 PONHC/G 可以储存硫并减轻溶解多硫化物的扩散。作为正极，S@PONHC/G 表现出优异的循环稳定性和倍率性能，这通过多硫化物吸附分析得到证实。因此，通过对这些主体材料进行进一步的改性和优化，PONHC/G 可能在 Li-S 电池的商业化中作为硫支架表现出很高的潜力。
