title: Earth Abundant Fe/Mn-Based Layered Oxide Interconnected Nanowires for Advanced K-Ion Full Batteries.
abstract: K-ion battery (KIB) is a new-type energy storage device that possesses potential advantages of low-cost and abundant resource of K precursor materials. However, the main challenge lies on the lack of stable materials to accommodate the intercalation of large-size K-ions. Here we designed and constructed a novel earth abundant Fe/Mn-based layered oxide interconnected nanowires as a cathode in KIBs for the first time, which exhibits both high capacity and good cycling stability. On the basis of advanced in situ X-ray diffraction analysis and electrochemical characterization, we confirm that interconnected K0.7Fe0.5Mn0.5O2nanowires can provide stable framework structure, fast K-ion diffusion channels, and three-dimensional electron transport network during the depotassiation/potassiation processes. As a result, a considerable initial discharge capacity of 178 mAh g-1is achieved when measured for KIBs. Besides, K-ion full batteries based on interconnected K0.7Fe0.5Mn0.5O2nanowires/soft carbon are assembled, manifesting over 250 cycles with a capacity retention of ∼76%. This work may open up the investigation of high-performance K-ion intercalated earth abundant layered cathodes and will push the development of energy storage systems.
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Xuanpeng
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Chaojiang
authors.initials: C
authors.lastname: Niu
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Jiashen
authors.initials: J
authors.lastname: Meng
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Xiong
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Ziang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Liqiang
authors.identifier: 0000-0003-4259-7725
authors.initials: L
authors.lastname: Mai
keywords: Fe/Mn-based layered oxide; Interconnected nanowires; K-ion full batteries; high-capacity; in situ X-ray diffraction; superior cycling stability