TY - JOUR
T1 - Fluorinated Interphase Enables Reversible Zn2+ Storage in Aqueous ZnSO4 Electrolytes
AU - Dai, Yuhang
AU - Li, Jiantao
AU - Zhang, Chengyi
AU - Lu, Ruihu
AU - Tao, Xiafang
AU - Owusu, Kwadwo Asare
AU - He, Guanjie
AU - Zhou, Yazhou
AU - Lu, Jun
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/11/10
Y1 - 2023/11/10
N2 - Aqueous zinc-ion batteries (AZIBs) using ZnSO4 aqueous electrolytes complement Li-ion batteries and offer high safety, low cost, and scalability. However, an inferior cycle life, attributed to the generation of basic layered double hydroxides (LDHs) on the cathode during cycling, hampers the development of AZIBs. Although Zn(CF3SO3)2 (Zn(OTf)2) electrolytes demonstrate exceptional performance, their higher cost in comparison to ZnSO4 offsets their electrochemical stability benefits. Toward this end, we propose a fluorinated interphase strategy to achieve a stable battery with ZnSO4 electrolytes by in situ pre-constructing the cathode-electrolyte interphase (CEI) of ZnOTf-LDH on the cathode surface. Unlike ZnSO4-LDH, which obstructs the diffusion channel of zinc ions, ZnOTf-LDH facilitates the desolvation of zinc ions, thereby enhancing the cycling stability (over 50 cycles at a low current density of 200 mA g-1). This work offers valuable insights into the degradation mechanism of AZIBs and provides an effective approach for developing stable and low-cost AZIBs.
AB - Aqueous zinc-ion batteries (AZIBs) using ZnSO4 aqueous electrolytes complement Li-ion batteries and offer high safety, low cost, and scalability. However, an inferior cycle life, attributed to the generation of basic layered double hydroxides (LDHs) on the cathode during cycling, hampers the development of AZIBs. Although Zn(CF3SO3)2 (Zn(OTf)2) electrolytes demonstrate exceptional performance, their higher cost in comparison to ZnSO4 offsets their electrochemical stability benefits. Toward this end, we propose a fluorinated interphase strategy to achieve a stable battery with ZnSO4 electrolytes by in situ pre-constructing the cathode-electrolyte interphase (CEI) of ZnOTf-LDH on the cathode surface. Unlike ZnSO4-LDH, which obstructs the diffusion channel of zinc ions, ZnOTf-LDH facilitates the desolvation of zinc ions, thereby enhancing the cycling stability (over 50 cycles at a low current density of 200 mA g-1). This work offers valuable insights into the degradation mechanism of AZIBs and provides an effective approach for developing stable and low-cost AZIBs.
UR - https://www.scopus.com/pages/publications/85177485521
U2 - 10.1021/acsenergylett.3c01737
DO - 10.1021/acsenergylett.3c01737
M3 - Article
AN - SCOPUS:85177485521
SN - 2380-8195
VL - 8
SP - 4762
EP - 4767
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 11
ER -
