DataVXACS Applied Energy MaterialsPaper
journal article·2022-07-25Open access

Vacancy and Composition Engineering of Manganese Hexacyanoferrate for Sodium-Ion Storage

Deia Abd El-Hady, Yuxiang Lyu, Sikai Zhan, Jixiang Yang, Yian Wang, Fei Yang, Qinglan Zhao, Meng Gu, Minhua Shao

ACS Applied Energy Materials· Volume 5· Issue 7
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Source abstract

Abstract

Manganese hexacyanoferrate (MnHCF) with an open framework is suitable for accommodating sodium ions. However, it suffers from severe capacity decay caused by the large structural deformation resulting from the Jahn–Teller (J–T) distortion of Mn–N6 octahedra. By taking advantage of the strong chelation between EDTA and Mn ions, a strategy employing Mn vacancies (VMn) in combination with the introduction of Ni is proposed to suppress the J–T distortion of MnHCF. A Ni-doped MnHCF with VMn and a low crystal water content (K1.95Na0.05Ni0.02Mn0.93[Fe(CN)6] □0.05·0.41H2O) is prepared, which delivered an improved capacity retention of 80% at 0.5C after 100 cycles. This work provides a combined vacancy and composition engineering strategy for effective suppression of J–T distortion in the MnHCF framework toward high-performance sodium-ion batteries.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

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

Affiliations

Department of Chemistry, College of Science, University of Jeddah, Jeddah 21589, Saudi Arabia

Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, P. R. China

Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077, China

Funding

Research Grants Council, University Grants Committee · Ministry of Education ? Kingdom of Saudi Arabi

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