journal article·2022-11-11Open access

Textured Na2V6O16·3H2O Cathode Tuned via Crystal Engineering Endows Aqueous Zn-Ion Batteries with High Rate Capability and Adequate Lifespan

Shijia Li, Xieyu Xu, Kai Wang, Weixin Chen, Xia Lu, Zhongxiao Song, Jang-Yeon Hwang, Jaekook Kim, Ying Bai, Yangyang Liu, Shizhao Xiong

ACS Energy Letters· Volume 7· Issue 11

Abstract

Aqueous zinc-ion batteries (ZIBs) play a vital role in large-scale energy storage for smart grids due to their environmental friendliness, safety, and low cost. Unfortunately, the application of ZIBs has been challenged by the relatively low capacity of cathode materials, especially at higher rates, which originates from the sluggish diffusion of Zn ions. Herein, a crystal engineering strategy is explored for using bernesite, Na2V6O16·3H2O (NVO), for regulating the diffusion-preferable texture, which was beneficial for fostering Zn ions' diffusion and thus guaranteeing a uniform concentration inside the cathode. An enlarged capacity at a higher rate was obtained, delivering a capacity of 156.9 mAh g-1 at the ultra-high current density of 20 A g-1, of which 140.6 mAh g-1 remained after 5000 cycles. The use of crystal engineering to regulate the texture of cathode materials paves the way to boost the application of NVO in aqueous ZIBs, which could be translated to design state-of-the-art cathodes for other battery systems.
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Research context

OpenAlex topics: Advanced battery technologies research · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies

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

Affiliations

International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, School of Physics and Electronics, Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng475004, P.R. China

State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an710049, P.R. China

School of Materials, Sun Yat-sen University, Shenzhen518107, P.R. China

Department of Materials Science and Engineering, Chonnam National University, Gwangju500-757, South Korea

Department of Physics, Chalmers University of Technology, SE 412 96Göteborg, Sweden

Funding

China Scholarship Council · National Natural Science Foundation of China · Chalmers Areas of Advance Materials Science and Energy · Zhong yuan Thousand Talents Program of Henan Province · Henan Overseas Expertise Introduction Center for Discipline Innovation · Science and Technology Development Project of Henan Province · Program for Innovative Research Team in Science and Technology in the University of Henan Province

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