Work

Enabling high reversible capacity of Ca metal batteries at 50 °C via thermally stable electrolytes

Year: 2026

Type: article

Abstract: Stable operation of Ca metal batteries at elevated temperatures is significantly limited by electrolyte volatility. In this study, a low-volatility Ca(CB 11 H 12 ) 2 /diglyme electrolyte with CaBr 2 enables stable Ca plating/stripping at 50 °C. In contrast to conventional volatile ether-based systems, this thermally stable electrolyte facilitates near-theoretical capacity utilization in NaTi 2 (PO 4 ) 3 cathodes, overcoming the kinetic limitations typically observed at room temperature. • Ca(CB 11 H 12 ) 2 /G 2 with CaBr 2 electrolyte enables stable Ca plating/stripping at 50 °C. • Inorganic-rich interphase enables stable Ca metal cycling at 50 °C. • Low volatility is attributed to the high-boiling point of G2 solvent. • Stable 50 °C operation enables near-theoretical Ca storage in NaTi 2 (PO 4 ) 3 .

Source: Electrochemistry Communications

DOI: 10.1016/j.elecom.2026.108159

Authors: Kohei Shibuya, Kazuaki Kisu, Shin-ichi Orimo

Institutions: Tohoku University, Sumitomo Metal Mining (Japan), Institute for Materials Research, Tohoku University, Shibaura Institute of Technology

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,630