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The formidable challenge is to develop suitable electrode materials and electrolytes for accommodating the relatively large size and high activity of potassium. Herein, Bi\u2010based materials are reported as novel anodes for PIBs. Nanostructural design and proper selection of the electrolyte salt have been used to achieve excellent cycling performance. It is found that the potassiation of Bi undergoes a solid\u2010solution reaction, followed by two typical two\u2010phase reactions, corresponding to Bi \u2194 Bi(K) and Bi(K) \u2194 K<jats:sub>5<\/jats:sub>Bi<jats:sub>4<\/jats:sub> \u2194 K<jats:sub>3<\/jats:sub>Bi, respectively. By choosing potassium bis(fluorosulfonyl)imide (KFSI) to replace potassium hexafluorophosphate (KPF<jats:sub>6<\/jats:sub>) in carbonate electrolyte, a more stable solid electrolyte interphase layer is achieved and results in notably enhanced electrochemical performance. More importantly, the KFSI salt is very versatile and can significantly promote the electrochemical performance of other alloy\u2010based anode materials, such as Sn and Sb.<\/jats:p>","DOI":"10.1002\/aenm.201703288","type":"journal-article","created":{"date-parts":[[2018,2,12]],"date-time":"2018-02-12T01:52:40Z","timestamp":1518400360000},"source":"Crossref","is-referenced-by-count":444,"title":["Boosting the Potassium Storage Performance of Alloy\u2010Based Anode Materials via Electrolyte Salt Chemistry"],"prefix":"10.1002","volume":"8","author":[{"given":"Qing","family":"Zhang","sequence":"first","affiliation":[{"name":"Institute for Superconducting and Electronic Materials University of Wollongong  Wollongong NSW 2522 Australia"}]},{"given":"Jianfeng","family":"Mao","sequence":"additional","affiliation":[{"name":"Institute for Superconducting and Electronic Materials University of Wollongong  Wollongong NSW 2522 Australia"}]},{"given":"Wei 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