@article{Chen2024, 
author = {Zhitao Chen and Huitian Liu and Jean Nei and Nian Liu},
title = {High-performance nickel metal hydride battery anode with enhanced durability and excellent low-temperature discharge capability},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {10},
pages = {8819-8825},
keywords = {nickel metal hydride (NiMH) batteries, hydrothermal synthesis, lanthanum fluoride, discharge capacity, low temperature},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6742-y},
doi = {10.1007/s12274-024-6742-y},
abstract = {Current AB5-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 stability. To overcome these challenges, we introduce a hydrothermal synthesized LaF3 coating layer on the surface of the AB5 anode material. This LaF3 coating layer adds a protective barrier for the active material, significantly improving the battery's cycle life and high-temperature stability. Our findings indicate that (1) the LaF3 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 AB5 alloy at 230.4 mAh/g in a –40 °C environment. This research presents a significant advancement in hydrogen storage alloy coatings and offers valuable insights for designing electrodes in NiMH batteries.}
}