A layer-structured Na2CoP2O7 pyrophosphate cathode for sodium-ion batteries

Prabeer Barpanda; Jiechen Lu; Tian Ye; Masataka Kajiyama; Sai-Cheong Chung; Naoaki Yabuuchi; Shinichi Komaba; Atsuo Yamada

doi:10.1039/C3RA23026K

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A layer-structured Na₂CoP₂O₇ pyrophosphate cathode for sodium-ion batteries†

Prabeer Barpanda,*^a Jiechen Lu,^a Tian Ye,^a Masataka Kajiyama,^b Sai-Cheong Chung,^a Naoaki Yabuuchi,^bc Shinichi Komaba^bc and Atsuo Yamada*^ac

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* Corresponding authors

^a Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 5-604, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, Japan
E-mail: prabeer@chemsys.t.u-tokyo.ac.jp, yamada@chemsys.t.u-tokyo.ac.jp
Fax: +81 3 5841 7488
Tel: +81 3 5841 7295

^b Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo, Japan
Fax: +81 3 5228 8749
Tel: +81 3 5228 8749

^c Unit of Elements Strategy Initiative for Catalysts & Batteries, ESICB, Kyoto University, Kyoto, Japan

Abstract

We introduce Na₂CoP₂O₇ pyrophosphate as a new potential cathode for sodium-ion batteries. Based on a layered structure, it offers a two-dimensional Na-diffusion pathway delivering a reversible capacity close to 80 mA h g⁻¹ involving Co³⁺/Co²⁺ redox activity with an average potential of 3 V.

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Article information

DOI: https://doi.org/10.1039/C3RA23026K
Article type: Communication
Submitted: 23 Nov 2012
Accepted: 22 Jan 2013
First published: 23 Jan 2013

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RSC Adv., 2013,3, 3857-3860

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A layer-structured Na₂CoP₂O₇ pyrophosphate cathode for sodium-ion batteries

P. Barpanda, J. Lu, T. Ye, M. Kajiyama, S. Chung, N. Yabuuchi, S. Komaba and A. Yamada, RSC Adv., 2013, 3, 3857 DOI: 10.1039/C3RA23026K

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