High-performance nickel metal hydride battery anode with enhanced durability and excellent low-temperature discharge capability

作     者：Zhitao Chen Huitian Liu Jean Nei Nian Liu 

作者机构：School of Chemical and Biomolecular EngineeringGeorgia Institute of TechnologyAtlantaGA 30332USA GP BatteriesHongkongChina 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2024年第17卷第10期

页      面：8819-8825页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Science Foundation(No.ECCS-2025462) financially supported by Enterprise Support Scheme(ESS),which is one of the funding programs of Innovation and Technology Fund by Hong Kong government and aims to provide funding support for local companies to conduct in-house research and development(R&D)work with a view to encouraging the private sector to invest in R&D 

主　　题：nickel metal hydride(NiMH)batteries hydrothermal synthesis lanthanum fluoride discharge capacity low temperature 

摘      要：Current AB_(5)-type hydrogen storage alloys employed in nickel-metal hydride(NiMH)batteries exhibit exceptional low-temperature discharge performance but suffer from limited cycle life and insufficient high-temperature *** overcome these challenges,we introduce a hydrothermal synthesized LaF_(3)coating layer on the surface of the AB_(5)anode *** LaF_(3)coating layer adds a protective barrier for the active material,significantly improving the battery s cycle life and high-temperature *** findings indicate that(1)the LaF_(3)coated anode demonstrates an extended cycle life with increased specific capacity and a capacity retention of 88%after 40 cycles of abusive overcharging and rapid discharging at room temperature.(2)The synthesized anode exhibits a 97%recovery of its specific capacity of 292.7 mAh/g following 144 h of high-temperature storage.(3)The low-temperature discharge capacity of the synthesized anode remains on par with the pristine AB_(5)alloy at 230.4 mAh/g in a-40℃*** research presents a significant advancement in hydrogen storage alloy coatings and offers valuable insights for designing electrodes in NiMH batteries.