Details

Autor(en) / Beteiligte

• Wang, Xi
• Zeng, Zihao
• Dong, Zeyu
• Ge, Peng
• Yang, Yue

Titel

Designing Urchin-Like S/SiO 2 with Regulated Pores Toward Ultra-Fast Room Temperature Sodium-Sulfur Battery

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2024-08, Vol.20 (34), p.e2400164

Ort / Verlag

Germany

Erscheinungsjahr

2024

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Captured by high theoretical capacity and low-cost, Sodium-Sulfur (Na-S) batteries have been deemed as promising energy-storage systems. However, their electrochemical properties, containing both cycling and rate properties, still suffer from the notorious "shuttle effect" of polysulfide. Herein, through the effective regulation of pore sizes, a series of S/SiO cathode materials are obtained. Benefitting from the abundant pore channels of SiO particles, the sulfur loading is as high as 76.3%. Importantly, a suitable pore size can lead to adequate reaction and rapid diffusion behaviors, resulting in excellent electrochemical performances. Specifically, at 2.0 A g , the initial capacity of the as-optimized sample can be up to 1370.6 mAh g . Surprisingly, even after 1050 cycles, it could achieve a high reversible capacity of 1280.8 mAh g with an attenuation rate of 0.089%. At 5.0 A g , after 500 cycles, the capacity can still remain ≈ 1132.6 mAh g (capacity retention rate, 97.5%). Given this, the work is anticipated to offer an effective strategy for advanced electrodes for Na-S batteries.