Research Projects

Sodium-ion batteries (SIBs) are regarded as "drop-in" technology and are of particular interest for applications where low-cost and high-performance energy storage are the key criteria. As similar to that All-solid-state batteries (ASSB) gained high attention over the past few years due to overwhelming advantages including high energy density and safety. So far, the ASSB research field is dominated by the development of solid electrolytes (SEs), anode, and cathode electrodes using Li+ as the transferring ion while research and development of materials for All-solid-state Na-ion batteries (ASSNaB) are infant stage. Therefore, this research project (HASSB) intends to develop thigh-capacity ASSNaB (Capacity: 1 Ah; Specific energy: Minimum: 100 Wh kg-1, Target: 150 Wh kg-1) using Sn-high entropy alloys (Sn-HEA), NaNiMnO2 and Na2(B10H10)0.5(B12H12)0.5 as an anode, cathode and solid electrolyte, respectively. Most importantly, the present HASSB project will aim to understand fundamental challenges associated with ASSNaB studies including volume changes of the electrode (Sn-HEA), the mechanism for Na+ storage under solid-state configuration, and the stability of electrode-electrolyte interphase. These studies will be done with the help of in situ electrochemical dilatometry (ECD), in situ pressure monitoring measurements, and ex-situ X-ray diffraction studies.