硫黄
多孔性
材料科学
锂(药物)
吸附
空位缺陷
化学工程
无机化学
化学
冶金
复合材料
有机化学
结晶学
医学
工程类
内分泌学
作者
Feng Long,Yang Huang,Mehraj Ahmad,Бо Лю,Jiaqi Xu,Yihong Liu,Farzad Seidi,Dongqing Wang,Zixia Lin,Huining Xiao
标识
DOI:10.1002/chem.202402200
摘要
Severe shuttle effect of soluble polysulfides and sluggish redox kinetics have been thought of as the critical issues hindering the extensive applications of lithium-sulfur batteries (LSBs). Herein, one-dimensional boron nitride (1D BN) fibers with abundant pores and sufficient N-vacancy defects were synthesized using a thermal crystallization following a pre-condensation step. The 1D structure of BN facilitates unblocked ions diffusion pathways during charge/discharge cycles. The embedded pores within the polar BN strengthen the immobilization of polysulfides via both physical confinement and chemical interaction. Moreover, the highly exposed active surface area and intentionally created N-vacancy sites substantially promote reaction kinetics by lowering the energy barriers of the rate-limiting steps. After incorporating with conductive carbon networks and elemental S, the as-prepared S/Nv-BN@CBC cathode of LSBs deliver an initial discharge capacity of up to 1347 mAh g
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