Abstract
The stability of electrode/electrolyte interfaces play a key role in the performance-determination of solid state batteries[1]. Such interfacial stability including not only the chemical/electrochemical stability such as side reactions, but also physical or electrochemo-stabilitry such as stable physical contact between solid electrode and solid electrolytes which may not a big issue in liquid-type Li-ion batteries[2]. In this presentation, we will present some newest research[3-6] in the comprehensive characterization and undersstanding of the effects of interfacial behaviour on the electrochemical performance of the oxide-type or sulfide-type solid state batteries with high capacity cathodes such as Ni-rich and Sulfur-based cathodes. In addition, operando-NMR results reveal the failure processes of Li metal anode in all-solid-state Li battery(ASSLB)[7] will be also presented. It is also shown that Ni-rich cathode is able to deliver a high areal capacity (~13mAh/cm2) but with promising long-term stability in ASSLB. [8] Reference s : Y. Yang, Solid State Electrochemistry; First Edition, Chem. Indus. Press, Beijing, 2017Y. X. Xiang, et al; Materials Today; 2020 ，36，139-157J. P. Zhu, et al; Chem. Mater.; 2020, 32，4998-5003X. S.Liu, et al; Advanced Energy Materials; 2021，11, 2003583Z.R.Chen, et al; ACS Energy Lett.; 2022, 7(8), 2761Y. Q. Wu et al; Energy Environmental Science; 2022, 15, 3470Z. T.Liang, et al; Nature Commun., 2023, 14, 259Z.T.Liang et al; submitted
Published Version
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