Reconstructing Vanadium Oxide with Anisotropic Pathways for a Durable and Fast Aqueous K-Ion Battery
Liang, Guojin1; Gan, Zhongdong2; Wang, Xiaoqi3; Jin, Xu3; Xiong, Bo3; Zhang, Xiankun4; Chen, Shimou5; Wang, Yanlei5; He, Hongyan5; Zhi, Chunyi1,6
Source PublicationACS NANO
AbstractAqueous potassium-ion batteries are long-term pursued, due to their excellent performance and intrinsic superiority in safe, low-cost storage for portable and grid-scale applications. However, the notorious issues of K-ion battery chemistry are the inferior cycling stability and poor rate performance, due to the inevitably destabilization of the crystal structure caused by K-ions with pronouncedly large ionic radius. Here, we resolve such issues by reconstructing commercial vanadium oxide (alpha-V2O5) into the bronze form, i.e., delta-K0.5V2O5 (KVO) nanobelts, as cathode materials with layered structure of enlarged space and anisotropic pathways for K-ion storage. Specifically, it can deliver a high capacity as 116 mAh g(-1) at the 1 C-rate, an outstanding rate capacity of 65 mAh g(-1) at 50 C, and a robust cyclic stability with 88.2% capacity retention after 1,000 cycles at 1 C. When coupled with organic anode in a full-cell configuration, the KVO electrodes can output 95 mAh g(-1) at 1 C and cyclic stability with 77.3% capacity retention after 20,000 cycles at 10 C. According to experimental and calculational results, the ultradurable cyclic performance is assigned to the robust structural reversibility of the KVO electrode, and the ultrahigh-rate capability is attributed to the anisotropic pathways with improved electrical conductivity in KVO nanobelts. In addition, applying a 22 M KCF3SO3 water-in-salt electrolyte can impede the dissolving issues of the KVO electrode and further stabilize the battery cyclic performance. Lastly, the as-designed AKIBs can operate with superior low-temperature adaptivity even at -30 degrees C. Overall, the KVO electrode can serve as a paradigm toward developing more suitable electrode materials for high-performance AKIBs.
Keywordaqueous K-ion battery reconstructed vanadium oxide anisotropic pathways durable and fast K-ion storage water-in-salt electrolyte
Funding ProjectGRF[CityU11212920]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationGRF
WOS IDWOS:000747115200052
Citation statistics
Document Type期刊论文
Corresponding AuthorWang, Yanlei; He, Hongyan; Zhi, Chunyi
Affiliation1.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China
2.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
3.PetroChina Res Ctr New Energy, Res Inst Petr Explorat & Dev RIPED, Beijing 100083, Peoples R China
4.Univ Sci & Technol Beijing, Sch Mat Sci & Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
5.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
6.City Univ Hong Kong, Ctr Adv Nucl Safety & Sustainable Dev, Hong Kong 999077, Peoples R China
Recommended Citation
GB/T 7714
Liang, Guojin,Gan, Zhongdong,Wang, Xiaoqi,et al. Reconstructing Vanadium Oxide with Anisotropic Pathways for a Durable and Fast Aqueous K-Ion Battery[J]. ACS NANO,2021,15(11):17717-17728.
APA Liang, Guojin.,Gan, Zhongdong.,Wang, Xiaoqi.,Jin, Xu.,Xiong, Bo.,...&Zhi, Chunyi.(2021).Reconstructing Vanadium Oxide with Anisotropic Pathways for a Durable and Fast Aqueous K-Ion Battery.ACS NANO,15(11),17717-17728.
MLA Liang, Guojin,et al."Reconstructing Vanadium Oxide with Anisotropic Pathways for a Durable and Fast Aqueous K-Ion Battery".ACS NANO 15.11(2021):17717-17728.
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