TY - JOUR
T1 - Preferential Pyrolysis Construction of Carbon Anodes with 8400 h Lifespan for High-Energy-Density K-ion Batteries
AU - Yin, Jian
AU - Jin, Junjie
AU - Chen, Cailing
AU - Lei, Yongjiu
AU - Tian, Zhengnan
AU - Wang, Yizhou
AU - Zhao, Zhiming
AU - Emwas, Abdul Hamid
AU - Zhu, Yunpei
AU - Han, Yu
AU - Schwingenschlögl, Udo
AU - Zhang, Wenli
AU - Alshareef, Husam N.
N1 - Funding Information:
The research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST) (BAS/1/1317‐01‐01).
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/4/17
Y1 - 2023/4/17
N2 - Carbonaceous materials are promising anodes for practical potassium-ion batteries, but fail to meet the requirements for durability and high capacities at low potentials. Herein, we constructed a durable carbon anode for high-energy-density K-ion full cells by a preferential pyrolysis strategy. Utilizing S and N volatilization from a π–π stacked supermolecule, the preferential pyrolysis process introduces low-potential active sites of sp2 hybridized carbon and carbon vacancies, endowing a low-potential “vacancy-adsorption/intercalation” mechanism. The as-prepared carbon anode exhibits a high capacity of 384.2 mAh g−1 (90 % capacity locates below 1 V vs. K/K+), which contributes to a high energy density of 163 Wh kg−1 of K-ion full battery. Moreover, abundant vacancies of carbon alleviate volume variation, boosting the cycling stability over 14 000 cycles (8400 h). Our work provides a new synthesis approach for durable carbon anodes of K-ion full cells with high energy densities.
AB - Carbonaceous materials are promising anodes for practical potassium-ion batteries, but fail to meet the requirements for durability and high capacities at low potentials. Herein, we constructed a durable carbon anode for high-energy-density K-ion full cells by a preferential pyrolysis strategy. Utilizing S and N volatilization from a π–π stacked supermolecule, the preferential pyrolysis process introduces low-potential active sites of sp2 hybridized carbon and carbon vacancies, endowing a low-potential “vacancy-adsorption/intercalation” mechanism. The as-prepared carbon anode exhibits a high capacity of 384.2 mAh g−1 (90 % capacity locates below 1 V vs. K/K+), which contributes to a high energy density of 163 Wh kg−1 of K-ion full battery. Moreover, abundant vacancies of carbon alleviate volume variation, boosting the cycling stability over 14 000 cycles (8400 h). Our work provides a new synthesis approach for durable carbon anodes of K-ion full cells with high energy densities.
KW - Carbon Anode
KW - Potassium-Ion Battery
KW - Preferential Pyrolysis
KW - sp Hybridized Carbon
KW - Vacancy
UR - http://www.scopus.com/inward/record.url?scp=85150238296&partnerID=8YFLogxK
U2 - 10.1002/anie.202301396
DO - 10.1002/anie.202301396
M3 - Article
C2 - 36856567
AN - SCOPUS:85150238296
SN - 1433-7851
VL - 62
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 17
M1 - e202301396
ER -