Defect-free-induced Na+disordering in electrode materials

Jian Peng, Mingyang Ou, Haocong Yi, Xueping Sun, Yuanpeng Zhang, Bao Zhang, Yu Ding, Feng Wang, Songqi Gu, Carlos Alberto López, Wang Zhang, Yi Liu, Ju Fang, Peng Wei, Yuyu Li, Ling Miao, Jianjun Jiang, Chun Fang, Qing Li, María Teresa Fernández-DíazJosé Antonio Alonso, Shulei Chou, Jiantao Han

Research output: Contribution to journalArticlepeer-review

87 Scopus citations

Abstract

For reaching high-performance of electrode materials, it is generally believed that understanding the structure evolution and heterogeneous alignment effect is the key. Presently, a very simple and universally applicable self-healing method is investigated to prepare defect-free Prussian blue analogs (PBAs) that reach their theoretical capacity as cathode materials for sodium-ion batteries (SIBs). For direct imaging of the local structure and the dynamic process at the atomic scale, we deliver a fast ion-conductive nickel-based PBA that enables rapid Na+ extraction/insertion within 3 minutes and a capacity retention of nearly 100% over 4000 cycles. This guest-ion disordered and quasi-zero-strain nonequilibrium solid-solution reaction mechanism provides an effective guarantee for realizing long-cycle life and high-rate capability electrode materials that operate via reversible two-phase transition reaction. Unconventional materials and mechanisms that enable reversible insertion/extraction of ions in low-cost metal-organic frameworks (MOFs) within minutes have implications for fast-charging devices, grid-scale energy storage applications, material discovery, and tailored modification.

Original languageEnglish
Pages (from-to)3130-3140
Number of pages11
JournalEnergy and Environmental Science
Volume14
Issue number5
DOIs
StatePublished - May 2021

Funding

J. H. thanks the National Natural Science Foundation of China (Grant No. 51772117 and 51732005) and the National Key R&D Program of China (Grant No. 2016YFB0100302) for financial support. We thank the Analytical and Testing Centre and the State Key Laboratory of Materials Processing and Die & Mould Technology of HUST for the material characterization. J. A. A. acknowledges the financial support given by the Spanish Ministry of Economy and Competitiveness to the project MAT2017-84496-R. X. S. thanks the National Natural Science Foundation of China (Grant No. 11905081). We are grateful to ILL (Grenoble, France) for providing the neutron beam time.

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