Journal
ACS APPLIED ENERGY MATERIALS
Volume 6, Issue 6, Pages 3538-3548Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.3c001613538
Keywords
lithium-ion battery; polymer binder; silicon anode; self-healing; full cell
Ask authors/readers for more resources
A rapid self-healing polymer binder (Al/Alg-TUEG) was synthesized via dynamic coordination bonds and hydrogen bonds, exhibiting excellent performance as an anode material for high-energy-density lithium-ion batteries. The Si@Al/Alg-TUEG electrodes showed stable cycling for 300 cycles with a capacity retention rate of 77.4% at 0.5 C. This binder is a promising candidate for next-generation lithium-ion batteries.
Silicon (Si) with high specific capacity has received increasing attention for rechargeable battery anode materials. However, particle pulverization as a result of the large volume expansion of Si anodes further aggravated electrochemical performance degradation during the process of charging and discharging. In this work, we report the room-temperature rapid self-healing polymer binders (Al/Alg-TUEG) synthesized via dynamic coordination bonds (Al-O) and hydrogen bonds from poly(etherthioureas) (TUEG). The prepared polymer binders exhibit a peeling force of 4.2 N, a swelling ratio of 9.5%, and a recovery of 90% in 2 h at room temperature. As a result, the Si@Al/Alg-TUEG anodes stably cycle for 300 cycles at 0.5 C with a capacity retention rate of 77.4%. A high initial Coulombic efficiency (CE) of 87.2% and good rate performance are also achieved. In terms of full cell performance, both LiFePO4//Si@Al/Alg-TUEG and NCM811//Si@Al/Alg-TUEG display stable cycling for 100 cycles at 0.5 C. The capacity retention of both full cells reaches 93.8 and 92.5%. Good recoverability at high rates is also found. The superior electrochemical performance of the Si anode indicates that Al/Alg-TUEG polymer with rapid self-healing capability at room-temperature is one of the promising binder candidates for next-generation high-energy-density lithium-ion batteries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available