陈璞 | Aqueous Battery

陈璞教授，加拿大工程院院士，宁波东方理工大学讲席教授，曾任加拿大滑铁卢大学终身讲席教授、加拿大纳米制造领域研究首席教授，中国国务院侨务办公室专家委员会成员以及中国科学院专家评审委员会成员。陈璞教授的杰出贡献使其获得众多奖项，包括安大略省长卓越研究奖以及滑铁卢大学工程学院杰出成就奖等。其研究横跨物理、化学、生物、纳米技术及绿色能源工程等多个交叉学科领域，研究内容主要包括水系电池：新型电解质、正负极材料及界面研究；纳米生物材料及小核酸药物开发，药物及基因递送系统等。作为第一作者或通讯作者已在 Sci. Adv.; JACS, Angew. Chem.; Adv. Mater., Adv. Energy Mater. 等顶级期刊发表论文 300 余篇，总引用次数超 20,000 次。持有发明专利 200 余项，主持重大科研项目 50 余项，凭借两类核心专利，已成功孵化两家初创企业。

As lithium-ion batteries with organic electrolytes are extensively utilized in electronic devices and electric vehicles, there are increasing safety concerns due to their flammability and toxicity, rendering them undesirable for large-scale energy storage systems. Furthermore, the stringent moisture-free processes required for the assembly of these flammable organic electrolytes incur substantial manufacturing costs. Replacing flammable organic electrolytes with aqueous electrolytes presents a viable solution to address the safety issues associated with conventional Li-ion batteries and to reduce manufacturing expenses. However, the electrochemical stability window of aqueous electrolyte is generally narrow, which severely constrains the energy density of aqueous batteries. Recently, the “water-in-salt” concept has introduced a concentrated electrolyte design that expands the ESW of aqueous electrolytes, which nevertheless suffers from limited cycle life and poor tolerance under extreme conditions. In this talk, we present our recent discovery that both Li+ migration kinetics in aqueous electrolytes and the selectivity of Li+/H+ transport on electrode surfaces can be simultaneously tailored by trimethyl phosphate and an in-situ formed lithium phosphate interphase, respectively. This dual enhancement of liquid and interfacial ion conductions encourages us to develop a novel lithium methanesulfonate-TMP-H₂O aqueous electrolyte with an unprecedented electrochemical stability window (4.5 V), anti-frozen feature (operatable at -40℃), excellent abuse tolerance and a low bill of materials (even close to dilute aqueous sulfate electrolyte). In addition, we will share our view on how to go beyond the lithium ion chemistry in developing aqueous batteries.