Measurements of Entropy Changes of Battery Electrode Materials Using Electrochemical Isothermal Calorimetry
Year: 2026
Type: article
Abstract: This study introduces an innovative approach for directly measuring the entropy changes upon lithiation (∆S Li ) of active battery materials at a specific temperature, employing electrochemical isothermal microcalorimetry (EIMC) through a protocol that consists of successive small loops. In contrast to ∆S Li found in existing literature, which are generally obtained indirectly using a potentiometric method by assessing the equilibrated open-circuit voltage (OCV) gradient over a temperature range, the values obtained for graphite and NMC811 have a low-level hysteresis. Furthermore, this method demonstrated a unique ability to quantify the significant intrinsic hysteresis present in silicon.
Source: ECS Advances
Authors: Xiaoming Ren, Jeffrey A. Read
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,500
OpenAlex ID: W7130328162