TY - JOUR
T1 - Graphdiyne/Graphene/Graphdiyne Sandwiched Carbonaceous Anode for Potassium-Ion Batteries
AU - Li, Jiaqiang
AU - Yi, Yuyang
AU - Zuo, Xintao
AU - Hu, Bingbing
AU - Xiao, Zhihua
AU - Lian, Ruqian
AU - Kong, Ya
AU - Tong, Lianming
AU - Shao, Ruiwen
AU - Sun, Jingyu
AU - Zhang, Jin
N1 - KAUST Repository Item: Exported on 2022-02-01
Acknowledgements: The authors acknowledge Analysis & Testing Center in Beijing Institute of Technology for the use of the in situ TEM platform. This work was financially supported by the Beijing National Laboratory for Molecular Sciences (BNLMS-CXTD-202001) and the National Natural Science Foundation of China (Grant Nos. 52021006, 51720105003, 21790052, and 21974004).
PY - 2022/1/28
Y1 - 2022/1/28
N2 - Graphdiyne (GDY) has been considered as an appealing anode candidate for K-ion storage since its triangular pore channel, alkyne-rich structure, and large interlayer spacing would endow it with abundant active sites and ideal diffusion paths for K-ions. Nevertheless, the low surface area and disordered structure of bulk GDY typically lead to unsatisfied K storage performance. Herein, we have designed a GDY/graphene/GDY (GDY/Gr/GDY) sandwiched architecture affording a high surface area and fine quality throughout a van der Waals epitaxy strategy. As tested in a half-cell configuration, the GDY/Gr/GDY electrode exhibits better capacity output, rate capability, and cyclic stability as compared to the bare GDY counterpart. In situ electrochemical impedance spectroscopy/Raman spectroscopy/transmission electron microscopy are further applied to probe the K-ion storage feature and disclose the favorable reversibility of GDY/Gr/GDY electrode during repeated potassiation/depotassiation. A full-cell device comprising a GDY/Gr/GDY anode and a potassium Prussian blue cathode enables a high cycling stability, demonstrative of the promising potential of the GDY/Gr/GDY anode for K-ion batteries.
AB - Graphdiyne (GDY) has been considered as an appealing anode candidate for K-ion storage since its triangular pore channel, alkyne-rich structure, and large interlayer spacing would endow it with abundant active sites and ideal diffusion paths for K-ions. Nevertheless, the low surface area and disordered structure of bulk GDY typically lead to unsatisfied K storage performance. Herein, we have designed a GDY/graphene/GDY (GDY/Gr/GDY) sandwiched architecture affording a high surface area and fine quality throughout a van der Waals epitaxy strategy. As tested in a half-cell configuration, the GDY/Gr/GDY electrode exhibits better capacity output, rate capability, and cyclic stability as compared to the bare GDY counterpart. In situ electrochemical impedance spectroscopy/Raman spectroscopy/transmission electron microscopy are further applied to probe the K-ion storage feature and disclose the favorable reversibility of GDY/Gr/GDY electrode during repeated potassiation/depotassiation. A full-cell device comprising a GDY/Gr/GDY anode and a potassium Prussian blue cathode enables a high cycling stability, demonstrative of the promising potential of the GDY/Gr/GDY anode for K-ion batteries.
UR - http://hdl.handle.net/10754/675265
UR - https://pubs.acs.org/doi/10.1021/acsnano.1c10857
U2 - 10.1021/acsnano.1c10857
DO - 10.1021/acsnano.1c10857
M3 - Article
C2 - 35089008
SN - 1936-0851
JO - ACS Nano
JF - ACS Nano
ER -