Title:Characterization and Optimization of Next-Generation Aqueous Batteries

Speaker:Zhang Leiting(Assistant Professor,Uppsala University,Sweden)

Time:July 11,2025(Friday),15:00-17:00

Venue:Room 105 of the Shaw Engineering Building,School of Chemistry and Chemical Engineering

Inviter:Professor Deng Yuanfu

Organizing Unit:School of Chemistry and Chemical Engineering

Speaker Profile:

Zhang Leiting is an Assistant Professor in the Department of Chemistry at Uppsala University,Sweden,and a doctoral supervisor.He obtained his Ph.D.from the Hong Kong University of Science and Technology in 2018,where he participated in a joint Ph.D.program with the Collège de France.He subsequently conducted postdoctoral research at the Paul Scherrer Institute(PSI)in Switzerland.He has published over 40 papers in journals such as Advanced Materials,Advanced Energy Materials,and ACS Energy Letters.He has received honors including the Swedish Foundation for Strategic Research Future Research Leader Fund,the Swedish Research Council Research Initiation Fund,the Bergstedt Prize from the Royal Society of Sciences in Uppsala,the Swedish Göran Gustafsson Foundation Young Scientist Award,and the American Chemical Society 2025 Rising Star Award.He is currently a member of the core working group of the EUBattery 2030+initiative and a Young Editorial Board member of JACS Au.

Abstract:

Aqueous batteries are highly regarded for their inherent safety,low cost,and sustainability,but they are still limited by a narrow electrochemical stability window and unresolved degradation mechanisms.This presentation will introduce the latest progress in understanding and overcoming these challenges through advanced characterization techniques and laboratory automation.Acoustic emission(AE)sensing technology,as a non-destructive testing method,has been applied to the study of chemical-mechanical degradation in TiS₂-based aqueous batteries,successfully capturing characteristic signals of particle fracture and hydrogen evolution reactions.The presentation will then introduce the closed-loop fully automated electrolyte development platform ODACell 2,which integrates automated coin cell assembly,electrochemical testing,and Bayesian optimization.This system successfully screened out a low-concentration organic-aqueous hybrid electrolyte suitable for LiFePO₄||Li₄Ti₅O₁₂ full cells within 100 iterations,achieving a Coulombic efficiency of over 95%while suppressing hydrogen gas evolution.These methods,through the integration of advanced sensing technologies,automation,and data-driven design,provide new ideas for the development of high-performance,long-life aqueous batteries.