Physics-based modeling of sodium-ion batteries part I: Experimental parameter determination. (1st February 2022)

• Record Type: Journal Article
• Authors: Chayambuka, Kudakwashe; Jiang, Ming; Mulder, Grietus; Danilov, Dmitri L.; Notten, Peter H.L.
• Is Part Of: Electrochimica acta. Volume 404(2022)
• Publication Date: 2022-02-01
• Subjects: Sodium-ion batteries -- Sodium-ion battery modeling -- Electrochemical parameters -- P2D battery parameters -- Hard carbon -- NVPF; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2021.139726
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Electrochemical parameters of SIBs are presented for the first time. Hard carbon (HC) and N a 3 V 2 ( P O 4 ) 2 F 3 (NVPF) parameters deduced from half-cells. HC//NVPF full cell SIB performance shown at different current rates. Mass transport limitations and Ohmic losses observed in NVPF cathode at high rates. Potential challenges for charging HC-based electrodes at high rates discussed. Abstract: Sodium-ion batteries (SIBs) have been heralded as the most promising "beyond lithium" energy storage technology. This proclamation is based on recent technological trends and the outstanding performance of the state-of-the-art prototype 18650 and pouch cells. However, improving the design and performance of SIBs requires an in-depth understanding of the electrochemical behavior of the electrodes from both an experimental and physics-based modeling perspective. In this contribution, experimental characterizations of SIB electrode materials based on N a 3 V 2 ( P O 4 ) 2 F 3 (NVPF) cathode and hard carbon (HC) anode are presented. The goal of this experimental investigation is to understand the individual electrode behavior and further elucidate relevant parameters for physics-based models. As a result, geometric, thermodynamic, and kinetic parameters are deduced from the two SIB electrodes. Based on the analyses of Na//NVPF and Na//HC half-cells, diffusion mass transport limitations and Ohmic losses are identified for both electrodes. These overpotential losses are equally present in full cell SIBs composed of NVPF and HC electrodes. These results are useful in the setup of SIB physics-based models.