Hybrid Sub‐1 nm Nanosheets of Co‐assembled MnZnCuOx and Polyoxometalate Clusters as Anodes for Li‐ion Batteries

• Published in: Angewandte Chemie International Edition Vol. 62; no. 39; pp. e202309934 - n/a
• Main Authors: Yuan, Guobao, Ge, Huaiyun, Shi, Wenxiong, Liu, Junli, Zhang, Yu, Wang, Xun
• Format: Journal Article
• Language: English
• Published: Germany 25.09.2023
• Subjects: Anode Materials; Lithium Storage; Nanosheet; Polyoxometalate; Sub-1 Nm; Polyoxometalate; anode materials; lithium storage; Nanosheet; sub-1 nm
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.202309934

Transition metal oxide (TMO) anode materials in lithium‐ion batteries (LIBs) usually suffer from serious volume expansion leading to the pulverization of structures, further giving rise to lower specific capacity and worse cycling stability. Herein, by introducing polyoxometalate (POM) clusters into TMOs and precisely controlling the amount of POMs, the MnZnCuOx‐phosphomolybdic acid hybrid sub‐1 nm nanosheets (MZC‐PMA HSNSs) anode is successfully fabricated, where the special electron rich structure of POMs is conducive to accelerating the migration of lithium ions on the anode to obtain higher specific capacity, and the non‐covalent interactions between POMs and TMOs make the HSNSs possess excellent structural and chemical stability, thus exhibiting outstanding electrochemical performance in LIBs, achieving a high reversible capacity (1157 mAh g−1 at 100 mA g−1) and an admirable long‐term cycling stability at low and high current densities. A novel hybrid sub‐1 nm nanosheets anode co‐assembled by MnZnCuOx (MZC) and phosphomolybdic acid (PMA) was successfully constructed via introducing PMA clusters into MZC and precisely controlling the amount of PMA. The non‐covalent interactions endowed the nanosheets with excellent structural stability, while the electron‐rich properties of PMA greatly increased Li+ adsorption energy, thus exhibiting outstanding lithium storage performance.