Affiliation:
1. State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 P. R. China
2. Chengde Iron and Steel Group Co., Ltd HBIS Group Co., LTD Chengde Hebei 067102 China
3. School of Pharmacy and Life Sciences Robert Gordon University Aberdeen AB107GJ UK
Abstract
AbstractSodium (Na) batteries are being considered as prospective candidates for the next generation of secondary batteries in contrast to lithium‐based batteries, due to their high raw‐material abundance, low cost, and sustainability. However, the unfavorable growth of Na‐metal deposition and severe interfacial reactions have prevented their large‐scale applications. Here, a vacuum filtration strategy, through amyloid‐fibril‐modified glass‐fiber separators, is proposed to address these issues. The modified symmetric cell can be cycled for 1800 h, surpassing the performance of previously reported Na‐based electrodes under an ester‐based electrolyte. Moreover, the Na/Na3V2(PO4)3 full cell with a sodiophilic amyloid‐fibril‐modified separator exhibits a capacity retention of 87.13% even after 1000 cycles. Both the experimental and the theoretical results show that the sodiophilic amyloid fibril homogenizes the electric field and Na‐ion concentration, fundamentally inhibiting dendrite formation. Simultaneously, the glutamine amino acids in the amyloid fibril have the highest adsorption energy for Na, resulting in the formation of a stable Na3N‐ and NaNxOy‐rich solid‐electrolyte‐interface film on the anode during cycling. This work provides not only a possible pathway to solve the dendrite problem in metal batteries using environmentally friendly biomacromolecular materials, but also a new direction for expanding biomaterial applications.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hebei Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
1 articles.
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