DataVXACS Energy LettersPaper
journal article·2022-01-14

Mn-Rich Phosphate Cathodes for Na-Ion Batteries with Superior Rate Performance

Chunliu Xu, Ruijuan Xiao, Junmei Zhao, Feixiang Ding, Yang Yang, Xiaohui Rong, Xiaodong Guo, Chao Yang, Huizhou Liu, Benhe Zhong, Yong-Sheng Hu

ACS Energy Letters· Volume 7· Issue 1
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Source abstract

Abstract

A Mn-based NASICON-type Na4VMn(PO4)3 cathode is considered to be one of the most promising substitutions for Na3V2(PO4)3 due to the huge abundance and appropriate redox potential from Mn. However, the current Na4VMn(PO4)3/C cathode still delivers a limited electrochemical performance due to the sluggish kinetics and negative structural degradation caused by the Mn in the structure. Herein, a selective replacement of vanadium rather than manganese in the Na4VMn(PO4)3 system was developed to fully utilize the manganese element and enhance the structural stability. Both experimental and calculation results affirmed that the Al-substituted Na4V0.8Al0.2Mn(PO4)3 cathode shows favorable Na+ kinetics and structure stability. The resulting Na4V0.8Al0.2Mn(PO4)3 reveals a discharge capacity of ∼84 mA h g–1 at 40 C and renders a capacity retention of 92% after cycling 1000 times at 5 C. Inspired by the availability of Al dopants, we also demonstrated the Al-doped Mn-richer Na4.2V0.6Al0.2Mn1.2(PO4)3 to be a viable candidate for Mn-rich phosphate cathodes.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

School of Chemical Engineering, Sichuan University, Chengdu 610065, People’s Republic of China

Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China

Funding

State Key Laboratory of Polymer Materials Engineering · National Natural Science Foundation of China · Chinese Academy of Sciences · Sichuan University and Zigong City Joint research project, China · Key Research and Development Program, Sichuan Province · Innovation Academy for Green Manufacture, CAS · Science and Technology Project of Inner Mongolia · Science and Technology Achievement Transformation Project of Sichuan Province · Distinguished Young Foundation of Sichuan Province · DNL Cooperation Fund, CAS · Innovation and Entrepreneurship Talent Team Project of Shaoguan City, China

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