Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 5, Pages 1583-1589Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm5041375
Keywords
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Funding
- U.S. Department of Energy Office of Basic Energy Sciences [DE-AC02-05CH11231]
- National Basic Research Program of China [2014CB931700]
- NSFC [11074314, 11304405]
- China Scholarship Council (CSC) [2010850533]
- DOE Office of Science Early Career Research Program
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Development of novel electrode materials is essential to achieve high-performance lithium ion batteries. Here, we demonstrate that amorphous nickel iron complex hydroxides (Ni-Fe-OH) synthesized by a laser-chemical method can be used as a potential conversion anode material for lithium storage. Complementary characterizations, including ensemble-averaged X-ray absorption spectroscopy, spatially resolved electron energy-loss spectroscopy, and energy dispersive X-ray spectroscopy in a scanning transmission electron microscope, were performed to reveal the chemical and structural evolutions of the active hydroxide particles undergoing electrochemical cycling. The solid-electrolyte interphase (SEI) layer with a primary component of lithium fluoride (LiF) was found and remained robust on the particle surface during the charge/discharge processes, which suggests that the LiF-containing SEI layer plays a critical role in maintaining the stable capacity retention and good reversibility of the Ni-Fe-OH anode.
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