Micro/nanostructured TiNb2O7-related electrode materials for high-performance electrochemical energy storage: recent advances and future prospects. Issue 36 (3rd September 2020)

• Record Type: Journal Article
• Authors: Wang, Hongkang; Qian, Ruifeng; Cheng, Yonghong; Wu, Hong-Hui; Wu, Xianwen; Pan, Kunming; Zhang, Qiaobao
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 36(2020)
• Page Start: 18425
• Page End: 18463
• Publication Date: 2020-09-03
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta04209a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : This Review summarized the latest progress in structural engineering, material fabrication and enhancement of the electrochemical performances of micro/nanostructured TiNb2 O7 and its analogues for high-performance energy storage systems. Abstract : The increasing demand for large-scale electrochemical energy storage, such as lithium ion batteries (LIBs) for electric vehicles and smart grids, requires the development of advanced electrode materials. Ti–Nb–O compounds as some of the most promising intercalation-type anode materials have attracted a lot of attention owing to their high theoretical capacity (388–399 mA h g −1 ) arising from the multiple redox pairs (Ti 4+ /Ti 3+, Nb 5+ /Nb 4+, and Nb 4+ /Nb 3+ ), high safety, and superior cycling stability. However, their intrinsic low electronic conductivity and slow solid-state ion diffusion lead to unsatisfactory rate performance. To overcome these drawbacks, various efficient strategies have been proposed to improve the performance of Ti–Nb–O compounds, especially TiNb2 O7 . This Review aims to provide rational understanding of how structural engineering approaches ( e.g., dimensional/morphological control, doping/hybridizing with exotic elements/components, carbon coating/compositing, etc. ) improve the electrochemical properties of micro/nanostructured TiNb2 O7 -based anode materials. In addition, other Ti–Nb–O compounds with different compositions as anodes for LIBs and micro/nanostructured TiNb2 O7 -based anodes for other energy storage systems (sodium-ion batteries, hybrid supercapacitors, and vanadium redox flow batteries) are discussed. Finally, the challenges and opportunities for micro/nanostructured TiNb2 O7 -related electrode materials for high-performance energy storage applications are highlighted.