Environmentally phase-controlled stratagem for open framework pyrophosphate anode materials in battery energy storage. Issue 29 (9th July 2021)

• Record Type: Journal Article
• Authors: Zhang, Jianyong; Zhang, Jiafeng; Liu, Jun; Cao, Yang; Huang, Cancan; Ji, Guanjun; Zhao, Zaowen; Ou, Xing; Zhang, Bao
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 29(2021)
• Page Start: 9147
• Page End: 9157
• Publication Date: 2021-07-09
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc02106k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Conventional pyrophosphate anode electrochemical performance is restrained by its phase impurity, and the inevitable phase impurity is attributed to the traditional pyrophosphate material being obtained through high temperature (∼1000 °C). Abstract : Conventional pyrophosphate anode electrochemical performance is restrained by its phase impurity, and the inevitable phase impurity is attributed to the traditional pyrophosphate material being obtained through high temperature (∼1000 °C). Herein, we report a novel phase-control stratagem that can obtain pure phase Mn2 P2 O7 at 300 °C. The obtained pure phase Mn2 P2 O7 presents 428.5 mA h g −1 after long cycles with superior stability in lithium ion battery systems. Moreover, it delivers promising electrochemical performance in the Na/K ion battery system. Furthermore, we applied the phase-control stratagem to the synthesis of a few pyrophosphate anodes, and successfully obtained the Co2 P2 O7, Ni2 P2 O7, TiP2 O7, and Fe2 Fe(P2 O7 )2 anodes, revealing that phase-control chemosynthesis is of great potential to the wide application of pyrophosphate fabrication. The phase controlled stratagem breaks the high temperature and phase impurity limitation of the traditional pyrophosphate anode synthesis, allowing for the stable and promising electrochemical cycling of pyrophosphate materials, and expands the further application and fabrication of pyrophosphate research studies on energy storage materials.