A staff led by researchers from Central South College (Changsha, Hunan, China) has proposed a cathode-electrolyte integration technique to provide a solid-state lithium-metal battery with enhanced cycle stability. A paper on their work is printed within the Journal of Energy Sources.
Stable-state lithium-metal batteries have many interesting properties, reminiscent of improved security and capability density. However, excessive interfacial resistance, uneven present density and extreme Li dendrite development attributable to inflexible contact on the cathode-electrolyte interface enormously limit their electrochemical efficiency and additional sensible software.
The Central South College staff used a poly(vinylidene fluoride)-based composite electrolyte as a cathode binder and a heat-pressing process to realize a comfortable interfacial contact.
Li et al.
As a result of modification technique, fabricated cells with built-in construction present decrease resistance, sooner Li-ion transport, enhanced capability and improved cycle stability. The built-in LiFePO4/Li cell displays superior electrochemical efficiency, which current a capability retention of 93.8% and 91.6% after 300 cycles at 0.5 C and 400 cycles at 1 C, respectively, having the ability to evaluate favorably with the standard cells utilizing liquid electrolyte.
Total, the research gives an answer for designing superior solid-state lithium steel batteries.
—Li et al.
Jingyi Li, Zhenyu Wang, Zhiwei Zhou, Cong Li, Zhenjiang He, Junchao Zheng, Yunjiao Li, Jing Mao, Kehua Dai, Cheng Yan (2022) “Cathode-electrolyte integrating technique enabling solid-state lithium steel battery with enhanced cycle stability,” Journal of Energy Sources, Quantity 544 doi: 10.1016/j.jpowsour.2022.231891.