PROTECTIVE COATING GIVES LI BATTERIES A BOOST

摘要

Yi Cui and co-workers present a clever scalable solution that addresses the large irreversible capacity loss that lithium-ion batteries can suffer in their first charging cycle when a passivation film called solid electrolyte interphase (SEI) forms on the anode's electrode/electrolyte interface. (DOI: 10.1021/jacs.5b04526). Lithium-ion batteries are the rechargeable energy source of choice for portable electronics because of their high energy density, resistance to the decline in capacity known as "battery memory", and slow charge loss when not in use. These batteries also have applications in electric cars, but in order for consumers to embrace this technology, the maximum driving range must be increased by boosting the battery's energy density.