Ionogel-based sodium ion micro-batteries with a 3D Na-ion diffusion mechanism enable ultrahigh rate capability

文献情報

出版日 2020-01-21

DOI 10.1039/C9EE03219C

インパクトファクター 38.532

著者

Huijuan Huang, Yanfeng Dong, Feng Zhou, Chenglin Sun, Zhong-Shuai Wu

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要旨

The rapid development of microelectronics and microsystems has stimulated the continuous evolution of high-performance and cost-effective micro-batteries. Despite their competitiveness with huge application potential, sodium ion micro-batteries (NIMBs) are still underdeveloped. Herein, we demonstrate one prototype of a quasi-solid-state planar ionogel-based NIMB constructed by separator-free interdigital microelectrodes of sodium titanate anode and sodium vanadate phosphate cathode, both of which are embedded into a three-dimensional interconnected graphene scaffold. Meanwhile, a novel NaBF4-based ionogel electrolyte with robust ionic conductivity of 8.1 mS cm−1 was used. Benefiting from the synergetic merits from the planar architecture, dominant pseudocapacitance contribution, and 3D multi-directional Na-ion diffusion mechanism, the as-assembled NIMBs exhibit high volumetric capacity of 30.7 mA h cm−3 at 1C, and high rate performance with 15.7 mA h cm−3 at 30C at room temperature and 13.5 mA h cm−3 at 100C at a high temperature of 100 °C. Moreover, the quasi-solid-state NIMBs present outstanding flexibility, tunable voltage and capacity output, and remarkable areal energy density of 145 μW h cm−2 (55.6 mW h cm−3). Therefore, this work will provide numerous chances to construct planar NIMBs for microsystems.

掲載誌

Energy & Environmental Science

CiteScore: 32.34

自己引用率: 3.4%

年間論文数: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

Ionogel-based sodium ion micro-batteries with a 3D Na-ion diffusion mechanism enable ultrahigh rate capability

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