用于锂硫电池的硅藻土/TiO/MoS/氮掺杂碳纳米纤维复合隔膜的设计
The Design of Diatomite/TiO/MoS/Nitrogen-Doped Carbon Nanofiber Composite Separators for Lithium-Sulfur Batteries.
作者信息
Zhong Wei, Xiao Wenjie, Liu Jianfei, Yang Chuxiao, Liu Sainan, Cai Zhenyang
机构信息
School of Materials Science and Engineering, Central South University, Changsha 410083, China.
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China.
出版信息
Materials (Basel). 2025 Aug 4;18(15):3654. doi: 10.3390/ma18153654.
Severe polysulfide shuttling and sluggish redox kinetics critically hinder lithium-sulfur (Li-S) battery commercialization. In this study, a multifunctional diatomite (DE)/TiO/MoS/N-doped carbon nanofiber (NCNF) composite separator was fabricated via hydrothermal synthesis, electrospinning, and carbonization. DE provides dual polysulfide suppression, encompassing microporous confinement and electrostatic repulsion. By integrating synergistic catalytic effects from TiO and MoS nanoparticles, which accelerate polysulfide conversion, and conductive NCNF networks, which facilitate rapid charge transfer, this hierarchical design achieves exceptional electrochemical performance: a 1245.6 mAh g initial capacity at 0.5 C and 65.94% retention after 200 cycles. This work presents a rational multi-component engineering strategy to suppress shuttle effects in high-energy-density Li-S batteries.
严重的多硫化物穿梭效应和迟缓的氧化还原动力学严重阻碍了锂硫（Li-S）电池的商业化。在本研究中，通过水热合成、静电纺丝和碳化制备了一种多功能硅藻土（DE）/TiO/MoS/N掺杂碳纳米纤维（NCNF）复合隔膜。DE提供双重多硫化物抑制作用，包括微孔限制和静电排斥。通过整合来自TiO和MoS纳米颗粒的协同催化效应（加速多硫化物转化）以及促进快速电荷转移的导电NCNF网络，这种分级设计实现了卓越的电化学性能：在0.5 C下初始容量为1245.6 mAh g，200次循环后保持率为65.94%。这项工作提出了一种合理的多组分工程策略，以抑制高能量密度Li-S电池中的穿梭效应。
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