Charge-discharge performance of Na(2/3)Fe(1/3)Mn(2/3)O(2) positive electrode in an ionic liquid electrolyte at 90 °C for sodium secondary batteries

野平, 俊之, 萩原, 理加, Hagiwara, Rika

doi:10.1016/j.electacta.2017.02.069

説明

Abstract Ionic liquid is a promising electrolyte for sodium secondary batteries because of its negligible volatility, low flammability, and high thermal and electrochemical stabilities. In this study, Na2/3Fe1/3Mn2/3O2 as a positive electrode material was synthesized by a solid-state reaction, and its charge-discharge performance was investigated at 90 °C in the ionic liquid electrolyte Na[FSA]-[C3C1pyrr][FSA] (FSA = bis(fluorosulfonyl)amide; C3C1pyrr = N-methyl-N-propylpyrrolidinium). The Na2/3Fe1/3Mn2/3O2 positive electrode delivered an initial discharge capacity of 227 mAh g−1 at a current rate of 20 mA g−1 in the voltage range of 2.0–4.3 V. This study is the first where the Na2/3Fe1/3Mn2/3O2 positive electrode demonstrated a high reversible discharge capacity, larger than 220 mAh g−1, due to the high operation temperature in the ionic liquid electrolyte.

収録刊行物

Electrochimica Acta

Electrochimica Acta 231 412-416, 2017-03-20

Elsevier BV

キーワード

詳細情報詳細情報について

CRID: 1050845760785025280

NII論文ID: 120006454694

ISSN: 00134686

DOI: 10.1016/j.electacta.2017.02.069

HANDLE: 2433/230504

本文言語コード: en

資料種別: journal article

データソース種別

IRDB
CiNii Articles
OpenAIRE

書き出し

問題の指摘