TY - JOUR
T1 - Designing electrolytes with high solubility of sulfides/disulfides for high-energy-density and low-cost K-Na/S batteries
AU - Tian, Liying
AU - Yang, Zhenghao
AU - Yuan, Shiyi
AU - Milazzo, Tye
AU - Cheng, Qian
AU - Rasool, Syed
AU - Lei, Wenrui
AU - Li, Wenbo
AU - Yang, Yucheng
AU - Jin, Tianwei
AU - Cong, Shengyu
AU - Wild, Joseph Francis
AU - Du, Yonghua
AU - Luo, Tengfei
AU - Long, Donghui
AU - Yang, Yuan
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - Alkaline metal sulfur (AMS) batteries offer a promising solution for grid-level energy storage due to their low cost and long cycle life. However, the formation of solid compounds such as M2S2 and M2S (M = Na, K) during cycling limits their performance. Here we unveil intermediate-temperature K-Na/S batteries utilizing advanced electrolytes that dissolve all polysulfides and sulfides (K2Sx, x = 1–8), significantly enhancing reaction kinetics, specific capacity, and energy density. These batteries achieve near-theoretical capacity (1655 mAh g−1 sulfur) at 75 °C with a 1 M sulfur concentration. At a 4 M sulfur concentration, they deliver 830 mAh g−1 at 2 mA cm−2, retaining 71% capacity after 1000 cycles. This new K-Na/S battery with specific energy of 150-250 Wh kg−1 only employs earth-abundant elements, making it attractive for long-duration energy storage.
AB - Alkaline metal sulfur (AMS) batteries offer a promising solution for grid-level energy storage due to their low cost and long cycle life. However, the formation of solid compounds such as M2S2 and M2S (M = Na, K) during cycling limits their performance. Here we unveil intermediate-temperature K-Na/S batteries utilizing advanced electrolytes that dissolve all polysulfides and sulfides (K2Sx, x = 1–8), significantly enhancing reaction kinetics, specific capacity, and energy density. These batteries achieve near-theoretical capacity (1655 mAh g−1 sulfur) at 75 °C with a 1 M sulfur concentration. At a 4 M sulfur concentration, they deliver 830 mAh g−1 at 2 mA cm−2, retaining 71% capacity after 1000 cycles. This new K-Na/S battery with specific energy of 150-250 Wh kg−1 only employs earth-abundant elements, making it attractive for long-duration energy storage.
UR - https://www.scopus.com/pages/publications/85203274804
U2 - 10.1038/s41467-024-51905-6
DO - 10.1038/s41467-024-51905-6
M3 - Article
C2 - 39237528
AN - SCOPUS:85203274804
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 7771
ER -