Hydrangea-like NiCo2O4 enable fast lithium ions transportation for high-performance reduced graphene oxide-based freestanding lithium-sulfur battery cathode

被引:0
作者
Li, Zhong [1 ]
Liang, Guoyi [1 ]
Wang, Tianle [1 ]
Liu, Jianpeng [1 ]
Cheng, Chang [1 ]
Ao, Guang [1 ]
Guan, Zefeng [1 ]
Tao, Tao [1 ]
Zhu, Jiliang [1 ]
机构
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium-sulfur battery; High-sulfur content; Lithium ion transport; Freestanding cathode; HIGH-CAPACITY; CARBON; PARTICLES; DENSITY;
D O I
10.1016/j.jpowsour.2025.236682
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To achieve high energy and power density in lithium-sulfur (Li-S) batteries, particular attention must be paid to the cathode side, specifically the sulfur content, cathode loading, and capacity within limited electrolyte conditions. In this study, hydrangea-like NiCo2O4 micro-particles are employed as structure element to create internal gaps within the reduced graphene oxide (rGO) matrix loaded with sulfur nanoparticles (Snp), facilitating the movement of lithium ions (Li+) and enhancing sulfur discharge reactions. This innovative cathode delivers a specific capacity of 1550 mAh g(-1) at 0.1 C (1 C = 1675 mAh g(-1)) and 896 mAh g(-1) at 1 C, with a maximum sulfur content of 70 % within the cathode. The Snp@rGO/15NiCo(2)O(4) electrode exhibits excellent cycling stability, maintaining 500 cycles at 1C and 900 cycles at 1.5 C, with only 0.08 % and 0.056 % capacity decay per cycle, respectively. These findings offer valuable insights for enhancing Li-S battery performance by opening the internal structure of the electrode with additional materials.
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页数:8
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