Lotus root-like porous carbon for potassium ion battery with high stabilityand rate performanceстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 июля 2020 г.
Аннотация:Potassium ion batteries as ideal alternatives to lithium-ion batteries are developing for promising portable device energy supply. However, the inferior rate and stability performance impede their practical applications. In this work, we fabricate the carbon-based potassium ion battery with good cycling stability and extraordinary rate performance, benefiting from i) the porous and robust structure, ii) good electronic properties and iv) suitable interlayer spacing for Kþ intercalation via in-situ nitrogen doping. Specifically, the in-situ growth of nitrogendoped lotus-root like carbon matrix contributes to porous and robust structures, which can keep the structural integrity even after long-term cycling test at high current density. Besides, the high conductivity with nitrogen doping contributes to fast current response and fast Kþ kinetics, exhibiting high rate capability and high surface contribution. The enlarged interlayer spacing for facilitated Kþ intercalation, together with a robust structure, result in high reversible capacity after cycling test.