Transformation of Polyoxometalate into 3D Porous Li‐Containing Oxide: A Case Study of γ‐LiV₂O₅ for High‐Performance Cathodes of Li‐Ion Batteries

Abstract

The development of cathode materials with high Li storage capacity and fast Li‐ion diffusion kinetics is considered to be a promising way to extend the energy and power densities of Li‐ion batteries (LIBs). As potential high‐capacity cathode materials for LIBs, polyoxometalates (POMs) suffer greatly from inherent drawbacks. Therefore, another possibility for the application of POMs in LIBs is shown, which is to transform POMs into relevant 3D porous Li‐containing oxides. Here, a unique 3D porous γ‐LiV2O5 film is successfully prepared by combining the electrostatic spray deposition technique and the POM as a precursor. Outstanding high capacity with stable cycling performance and excellent rate capability is realized based on 3D porous nanostructure and thin‐film morphology, which effectively facilitate the transport of both lithium ion and electron. Moreover, this work demonstrates the feasibility of achieving high‐performance metal oxide cathode by the transformation of POMs and also shows the superiority of γ‐phase over α‐phase as a starting cathode material in LIBs as well.

Regulating the Catalytic Dynamics Through a Crystal Structure Modulation of Bimetallic Catalyst

“…Hence, the crystal or surface structure of solid catalysts should be varied to not only enable the nucleation‐preferred formation of discharge products but also make the interaction between discharge products and catalyst surface appropriate. We believe that these rationales based on the growth dynamics of products from ORR/OER can be valid for a lot of solid catalysts and energy materials for future battery systems ranging from metals to oxides or hybrid materials …”

“…We believe that these rationales based on the growth dynamics of products from ORR/OER can be valid for a lot of solid catalysts and energy materials for future battery systems ranging from metals to oxides or hybrid materials. [39,40]…”

Cathodes for Aqueous Zn‐Ion Batteries: Materials, Mechanisms, and Kinetics

“…Vanadate‐based materials include alkaline metal vanadates and transition metal vanadates have been widely studied as electrodes for rechargeable batteries for more than 30 years, especially in regard to Li ion, [121–124] Na ion, [125–128] and Zn ion storage [108, 109] …”

“…Vanadate-based materials include alkaline metal vanadates and transition metal vanadates have been widely studied as electrodes for rechargeable batteries for more than 30 years, especially in regard to Li ion, [121][122][123][124] Na ion, [125][126][127][128] and Zn ion storage. [108,109] Mai's group reported novel Na 2 V 6 O 16 •1.63 H 2 O( H-NVO) nanowires, which possessed an excellent Zn 2 + storage capability and highly reversible property ( Figure 12).…”

Amphiphilic peroxo polyoxometalate as reaction control phase transfer catalyst for efficient epoxidation of olefins

“…Many transition metal catalysts have been used as catalysts for epoxidation [5,6]. Catalyst precursors of polyoxometalate or polyoxometalate species catalyzed, H 2 O 2 -based epoxidation of alkenes with high selectivity to the epoxide and high efficiency of H 2 O 2 utilization is recently possible [7][8][9][10][11][12][13]. Zuwei Xi and Shuang Gao et al reported the reaction-controlled phase-transfer catalyst system based on polyoxometalate [14][15][16][17][18].…”