DataVXAdvanced Functional MaterialsPaper
journal article·2023-07

Secondary‐Phase‐Induced Charge–Discharge Performance Enhancement of Co‐Free High Entropy Spinel Oxide Electrodes for Li‐Ion Batteries

Thi Xuyen Nguyen, Jagabandhu Patra, Chia‐Chien Tsai, Wen‐Ye Xuan, Hsin‐Yi Tiffany Chen, Matthew S. Dyer, Oliver Clemens, Ju Li, Subhasish Basu Majumder, Jeng‐Kuei Chang, Jyh‐Ming Ting

Advanced Functional Materials· Volume 33· Issue 30
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Source abstract

Abstract

Abstract High entropy oxide (HEO) has emerged as a new class of anode material for Li‐ion batteries (LIBs) by offering infinite possibilities to tailor the charge–discharge properties. While the advantages of single‐phase HEO anodes are realized, the effects of a secondary phase are overlooked. In this study, two kinds of Co‐free HEOs are prepared, containing Cr, Mn, Fe, Ni, and Zn, for use as LIB anodes. One is a plain cubic‐structure high entropy spinel oxide HESO (C) prepared using a solvothermal method. The other HESO (C+T) contains an extra secondary phase of tetragonal spinel oxide and is prepared using a hydrothermal method. It is demonstrated that the secondary tetragonal spinel phase introduces phase boundaries and defects/oxygen vacancies within HESO (C+T), which improve the redox kinetics and reversibility during electrode lithiation/delithiation. Density functional theory calculation is performed to assess the phase stability of cubic spinel, tetragonal spinel, and rock‐salt structures, and validate the cycling stability of the electrodes upon charging–discharging. The secondary‐phase‐induced rate capability and cyclability enhancement of HEO electrodes are for the first time demonstrated. A HESO (C+T)||LiNi0.8Co0.1Mn0.1O2 full cell is assembled and evaluated, showing a promising gravimetric energy density of ≈610 Wh kg−1 based on electrode‐active materials.
Source: crossref · Quality: baseline

Research context

Energy storage

OpenAlex topics: High Entropy Alloys Studies · Semiconductor materials and devices · Advancements in Battery Materials

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

Affiliations

Department of Materials Science and Engineering National Cheng Kung University 1 University Road Tainan 70101 Taiwan

Hierarchical Green‐Energy Materials (Hi‐GEM) Research Center National Cheng Kung University 1 University Road Tainan 70101 Taiwan

Department of Materials Science and Engineering National Yang Ming Chiao Tung University 1001 University Road Hsinchu 30010 Taiwan

Department of Engineering and Systems Science National Tsing Hua University Hsinchu 300044 Taiwan

School of Chemistry University of Liverpool Crown St Liverpool L69 7ZD UK

Materials Innovation Factory University of Liverpool 51 Oxford St Liverpool L7 3NY UK

Institut für Materialwissenschaft, Chemische Materialsynthese Universität Stuttgart Heisenbergstraße 3 70569 Stuttgart Germany

Department of Nuclear Science and Engineering and Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Avenue Cambridge MA 02139 USA

Materials Science Centre Indian Institute of Technology Kharagpur West Bengal 721302 India

Department of Industrial and Manufacturing Systems Engineering Kansas State University Manhattan KS 66506 USA

Department of Chemical Engineering Chung Yuan Christian University 200 Chung Pei Road Taoyuan 32023 Taiwan

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