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K0.83V2O5: A New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries.
ACS Appl Mater Interfaces. 2020 Feb 26; 12(8):9332-9340.AA

Abstract

Recently, potassium-ion batteries (PIBs) are being actively investigated. The development of PIBs calls for cathode materials with a rigid framework, reversible electrochemical reactivity, and a high amount of extractable K ions, which is extremely challenging due to the large size of potassium. Herein, a new layered compound K0.83V2O5 is reported as a potential cathode material for PIBs. It delivers an initial depotassiation capacity of 86 mAh g-1 and exhibits a reversible capacity of 90 mAh g-1 with a high redox potential of 3.5 V (vs K+/K) and a capacity retention of more than 80% after 200 cycles. Experimental investigations combined with theoretical calculation indicate that depotassiation-potassiation is accommodated by contraction-expansion of the interlayer spacing along with unpuckering-puckering of the layers. Additionally, the calculated electronic structure suggests the (semi)metallic feature of KxV2O5 (0 < x ≤ 0.875) and K-ion transport in the material is predicted to be one-dimensional with the experimentally estimated chemical diffusion coefficient in the order of 10-15-10-12 cm2 s-1. Finally, a K-ion full cell consisting of the K0.83V2O5 cathode and a graphite anode is demonstrated to deliver an energy density of 136 Wh kg-1. This study will provide insights for further designing novel layered cathodes with high K-ion content for PIBs.

Authors+Show Affiliations

School of Chemistry , Beihang University , Beijing 100191 , P. R. China.School of Chemistry , Beihang University , Beijing 100191 , P. R. China.School of Chemistry , Beihang University , Beijing 100191 , P. R. China.School of Chemistry , Beihang University , Beijing 100191 , P. R. China.Institute of Physics, Chinese Academy of Science , Beijing 100190 , P. R. China.Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Engineering , Tianjin University , Tianjin 300072 , P. R. China.Institute of Nuclear and New Energy Technology , Tsinghua University , Beijing 100084 , P. R. China.School of Chemistry , Beihang University , Beijing 100191 , P. R. China. Beijing Advanced Innovation Center for Biomedical Engineering , Beihang University , Beijing 100191 , P. R. China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31999423

Citation

Zhang, Yuchuan, et al. "K0.83V2O5: a New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries." ACS Applied Materials & Interfaces, vol. 12, no. 8, 2020, pp. 9332-9340.
Zhang Y, Niu X, Tan L, et al. K0.83V2O5: A New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries. ACS Appl Mater Interfaces. 2020;12(8):9332-9340.
Zhang, Y., Niu, X., Tan, L., Deng, L., Jin, S., Zeng, L., Xu, H., & Zhu, Y. (2020). K0.83V2O5: A New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries. ACS Applied Materials & Interfaces, 12(8), 9332-9340. https://doi.org/10.1021/acsami.9b22087
Zhang Y, et al. K0.83V2O5: a New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries. ACS Appl Mater Interfaces. 2020 Feb 26;12(8):9332-9340. PubMed PMID: 31999423.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - K0.83V2O5: A New Layered Compound as a Stable Cathode Material for Potassium-Ion Batteries. AU - Zhang,Yuchuan, AU - Niu,Xiaogang, AU - Tan,Lulu, AU - Deng,Leqing, AU - Jin,Shifeng, AU - Zeng,Liang, AU - Xu,Hong, AU - Zhu,Yujie, Y1 - 2020/02/12/ PY - 2020/1/31/pubmed PY - 2020/1/31/medline PY - 2020/1/31/entrez KW - K0.83V2O5 KW - cathode material KW - energy storage KW - layered vanadium oxide KW - potassium-ion battery SP - 9332 EP - 9340 JF - ACS applied materials & interfaces JO - ACS Appl Mater Interfaces VL - 12 IS - 8 N2 - Recently, potassium-ion batteries (PIBs) are being actively investigated. The development of PIBs calls for cathode materials with a rigid framework, reversible electrochemical reactivity, and a high amount of extractable K ions, which is extremely challenging due to the large size of potassium. Herein, a new layered compound K0.83V2O5 is reported as a potential cathode material for PIBs. It delivers an initial depotassiation capacity of 86 mAh g-1 and exhibits a reversible capacity of 90 mAh g-1 with a high redox potential of 3.5 V (vs K+/K) and a capacity retention of more than 80% after 200 cycles. Experimental investigations combined with theoretical calculation indicate that depotassiation-potassiation is accommodated by contraction-expansion of the interlayer spacing along with unpuckering-puckering of the layers. Additionally, the calculated electronic structure suggests the (semi)metallic feature of KxV2O5 (0 < x ≤ 0.875) and K-ion transport in the material is predicted to be one-dimensional with the experimentally estimated chemical diffusion coefficient in the order of 10-15-10-12 cm2 s-1. Finally, a K-ion full cell consisting of the K0.83V2O5 cathode and a graphite anode is demonstrated to deliver an energy density of 136 Wh kg-1. This study will provide insights for further designing novel layered cathodes with high K-ion content for PIBs. SN - 1944-8252 UR - https://www.unboundmedicine.com/medline/citation/31999423/K0_83V2O5:_A_New_Layered_Compound_as_a_Stable_Cathode_Material_for_Potassium_Ion_Batteries_ L2 - https://dx.doi.org/10.1021/acsami.9b22087 DB - PRIME DP - Unbound Medicine ER -
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