Abstract
Nickel–iron battery is highly desirable for energy storage systems in rural/remote areas for its safety, low cost, long cycle life. But it cannot be sealed and maintenance-free due to the hydrogen evolution reaction. Herein, we synthesized W2C nanocrystals embedded in porous graphene as catalysts for the hydrogen and oxygen recombination in the nickel–iron battery through in situ carburization of metallic W anchored on the graphene. The W2C/porous graphene nanocomposite catalyst exhibited a high performance with an average catalytic velocity of 3859 μmol h−1 gcat−1 and long catalytic life of 598,260 s without decay in the catalytic performance. With the non-noble metal catalyst of W2C/porous graphene nanocomposite, a nickel–iron battery could be sealed and maintenance-free, and it also exhibited low cost; thus, the nickel–iron battery can be used for large-scale energy storage systems in rural/remote areas.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
