Facile construction of a multilayered interface for a durable lithium‐rich cathode
Zhou Xu,
Yifei Yuan,
Qing Tang,
Xiangkun Nie,
Jianwei Li,
Qing Sun,
Naixuan Ci,
Zhenjie Xi,
Guifang Han,
Lijie Ci,
Guanghui Min
Affiliations
Zhou Xu
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Yifei Yuan
College of Chemistry and Materials Engineering Wenzhou University Wenzhou China
Qing Tang
College of Chemistry and Materials Engineering Wenzhou University Wenzhou China
Xiangkun Nie
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Jianwei Li
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Qing Sun
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Naixuan Ci
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Zhenjie Xi
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Guifang Han
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Lijie Ci
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Guanghui Min
Key Laboratory for Liquid–Solid Structural Evolution & Processing of Materials (Ministry of Education), Research Center for Carbon Nanomaterials, School of Materials Science and Engineering Shandong University Jinan China
Abstract Layered lithium‐rich manganese‐based oxide (LRMO) has the limitation of inevitable evolution of lattice oxygen release and layered structure transformation. Herein, a multilayer reconstruction strategy is applied to LRMO via facile pyrolysis of potassium Prussian blue. The multilayer interface is visually observed using an atomic‐resolution scanning transmission electron microscope and a high‐resolution transmission electron microscope. Combined with the electrochemical characterization, the redox of lattice oxygen is suppressed during the initial charging. In situ X‐ray diffraction and the high‐resolution transmission electron microscope demonstrate that the suppressed evolution of lattice oxygen eliminates the variation in the unit cell parameters during initial (de)lithiation, which further prevents lattice distortion during long cycling. As a result, the initial Coulombic efficiency of the modified LRMO is up to 87.31%, and the rate capacity and long‐term cycle stability also improved considerably. In this work, a facile surface reconstruction strategy is used to suppress vigorous anionic redox, which is expected to stimulate material design in high‐performance lithium ion batteries.
