Year: 2003
Type: article
Abstract: This paper relates to development of a new generation of Li/S rechargeable batteries with energy density exceeding 180 Wh/kg and rate capability comparable with aqueous systems. The cells demonstrate 5 C discharge rate at −40°C. Retained energy and capacity at −40°C exceeded 60 and 80%, respectively. At room temperature cells generate specific power up to 750 W/kg. Cells are inherently protected from overcharge at low and room temperatures by internal chemistry and can sustain 30 times overcharge. It was shown that at −40°C sulfur cathode discharge includes at least five steps, in contrast to the known two steps at room temperature. Thermal effects related to different charge-discharge steps were analyzed. Cell thermal model including Ohm and Arrhenius parts of polarization allowed simulation Ragone plots and capacity over a wide range of currents and temperatures. © 2003 The Electrochemical Society. All rights reserved.
DOI: 10.1149/1.1545452
Authors: Yuriy V. Mikhaylik, James R. Akridge
Institution: Sion Power (United States)
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2009618239