Premium
An Aluminum–Sulfur Battery with a Fast Kinetic Response
Author(s) -
Yang Huicong,
Yin Lichang,
Liang Ji,
Sun Zhenhua,
Wang Yuzuo,
Li Hucheng,
He Kuang,
Ma Lipo,
Peng Zhangquan,
Qiu Siyao,
Sun Chenghua,
Cheng HuiMing,
Li Feng
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201711328
Subject(s) - dissociation (chemistry) , sulfur , chemistry , arrhenius equation , reagent , electrochemistry , aluminium , current density , kinetic energy , reversible reaction , density functional theory , analytical chemistry (journal) , inorganic chemistry , activation energy , electrode , computational chemistry , catalysis , organic chemistry , physics , quantum mechanics
The electrochemical performance of the aluminum‐sulfur (Al‐S) battery has very poor reversibility and a low charge/discharge current density owing to slow kinetic processes determined by an inevitable dissociation reaction from Al 2 Cl 7 − to free Al 3+ . Al 2 Cl 6 Br − was used instead of Al 2 Cl 7 − as the dissociation reaction reagent. A 15‐fold faster reaction rate of Al 2 Cl 6 Br − dissociation than that of Al 2 Cl 7 − was confirmed by density function theory calculations and the Arrhenius equation. This accelerated dissociation reaction was experimentally verified by the increase of exchange current density during Al electro‐deposition. Using Al 2 Cl 6 Br − instead of Al 2 Cl 7 − , a kinetically accelerated Al‐S battery has a sulfur utilization of more than 80 %, with at least four times the sulfur content and five times the current density than that of previous work.