Details

Autor(en) / Beteiligte

• Zhao, Shupeng
• Zhang, Xiaomin
• Ma, Chuyin
• Liu, Yanyu
• Zhang, Wen
• Zhao, Yan

Titel

Fabrication of tantalum carbide cathode by ball milling processes for advanced lithium–sulfur batteries

Ist Teil von

• Journal of materials science, 2023-05, Vol.58 (17), p.7407-7417

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2023

Link zum Volltext

Quelle

SpringerLink

Beschreibungen/Notizen

• Lithium–sulfur (Li–S) batteries are considered to be one of the most developed portable secondary battery systems for next-generation energy storage technologies due to their high theoretical capacity and environmental benignity. Nevertheless, the unpleasant “shuttle effect” of lithium polysulfides (LiPSs) and sluggish reaction kinetics during the charge–discharge process seriously hinder their pragmatic applications. Herein, we employ transition metal carbide (TaC) as the effective sulfur cathode material for high performance Li–S batteries, the powder is pulverized into nanoscale particles by rotation or vibration of the simple ball mill. After milling, TaC particles show a significant amount of surface defect and oxygen functional groups but no signs of oxidation. Ball-milling TaC has high specific surface area and electrocatalytic sites to suppress the shuttle of soluble LiPSs during cycling and provide effective chemical interaction, while the surface oxygen functional groups of the material ensure high electrical conductivity and the electrons/ions transfer of the electrode. Due to the above advantages, the S-BM-TaC electrode delivered a large discharge capacity reaching 1040.1 mAh g −1 at the initial cycle at 0.2 C and performed an excellent cycle stability of 729.1 mAh g −1 at 1 C after 500 cycles. The results show that ball milling TaC as a sulfur immobilizer for Li–S batteries is a high-performance design strategy. Above all, this work holds great promise for utilization in practically viable Li–S batteries.