DataVXACS Energy LettersPaper
journal article·2026-01-09Open access

Na-Ion Battery with 180 Wh/kg and Long Cycle Life

Haibo Wang, Han Tang, Ting Lin, Hao Yu, Xi Liu, Jiao Zhang, Hao Guo, Shiyao Xia, Bingjie Zhang, Xiaobing Zhao, Zhao Chen, Bowen Wang, Fei Xie, Xingguo Qi, Yaxiang Lu, Lin Gu, Xiaohui Rong, Liquan Chen, Yong-Sheng Hu

ACS Energy Letters· Volume 11· Issue 1
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide Na-ion batteries are promising energy storage technologies, yet cathodes suffer from structural instability during deep cycling, leading to a trade-off between energy density and long-term life. Here, we introduce a “local electron density engineering” strategy to address this intrinsic challenge. We propose that structural degradation originates from the withdrawal of electron density from lattice oxygen by a high-valence transition metal. By incorporating stable d 10 (Zn 2+ ) and d 0 (Ti 4+ ) ions, we create an electron-rich oxygen framework that acts as an “electron buffer”, resisting this electron depletion. Reinforced further by Ca 2+ pillars in the Na + layers, our single-crystalline Na 0.96 Ca 0.02 Cu 0.038 Zn 0.053 Ni 0.409 Mn 0.315 Ti 0.185 O 2 cathode exhibits a low volume change of ∼4% under deep desodiation. In 26700 cylindrical full cells, it delivers an energy density of 181.2 Wh kg –1 and retains ∼80% capacity rentention after 1000 cycles. These results establish a new design pathway for developing ultrastable, high-energy cathode materials for next-generation Na-ion batteries.
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Research context

Energy storageComposites

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Thermal Expansion and Ionic Conductivity

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

Affiliations

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

College of Materials Science and Optoelectronic Technology

University of Chinese Academy of Sciences

Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials, School of Materials Science and Engineering

Tsinghua University

HiNa Battery Technology Co., Ltd.

Huairou Division, Institute of Physics

Neutron Scattering Laboratory, Department of Nuclear Physics

China Institute of Atomic Energy

Yangtze River Delta Physics Research Center

Funding

National Key Research and Development Program of China · Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China · Chinese Academy of Sciences · Jiangsu Provincial Carbon Peak and Neutrality Innovation Program · Beijing-Tianjin-Hebei Basic Research Cooperation Project

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