首页|Novel high-voltage cathode for aqueous zinc ion batteries:Porous K0.5VOPO4·1.5H2O with reversible solid-solution intercalation and conversion storage mechanism

Novel high-voltage cathode for aqueous zinc ion batteries:Porous K0.5VOPO4·1.5H2O with reversible solid-solution intercalation and conversion storage mechanism

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Cathode materials that possess high output voltage,as well as those that can be mass-produced using facile techniques,are crucial for the advancement of aqueous zinc-ion battery(ZIBs)applications.Herein,we present for the first time a new porous K0.5VOPO4.1.5H2O polyanionic cathode(P-KVP)with high output voltage(above 1.2 V)that can be manufactured at room temperature using straightforward coprecipitation and etching techniques.The P-KVP cathode experiences anisotropic crystal plane expan-sion via a sequential solid-solution intercalation and phase conversion pathway throughout the Zn2+stor-age process,as confirmed by in-situ synchrotron X-ray diffraction and ex-situ X-ray photoelectron spectroscopy.Similar to other layered vanadium-based polyanionic materials,the P-KVP cathode experi-ences a progressive decline in voltage during the cycle,which is demonstrated to be caused by the irre-versible conversion into amorphous VOx.By introducing a new electrolyte containing Zn(OTF)2 to a mixed triethyl phosphate and water solution,it is possible to impede this irreversible conversion and obtain a high output voltage and longer cycle life by forming a P-rich cathode electrolyte interface layer.As a proof-of-concept,the flexible fiber-shaped ZIBs based on modified electrolyte woven into a fabric watch band can power an electronic watch,highlighting the application potential of P-KVP cathode.

Aqueous zinc ion batteryCathodePorous materialHigh voltage platformIn-situ synchrotron X-ray diffraction

Liyu Wang、Mingliang Zhao、Xiaoyu Zhang、Menghua Wu、Yu Zong、Yu Chen、Xinliang Huang、Mingjie Xing、Xin Ning、Wen Wen、Daming Zhu、Xiaochuan Ren

展开 >

Industrial Research Institute of Nonwovens & Technical Textiles,College of Textiles & Clothing,Shandong Engineering Research Center for Specialty Nonwoven Materials,Qingdao University,Qingdao 266071,Shandong,China

Shanghai Synchrotron Radiation Facility,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China

National Natural Science Foundation of ChinaNatural Science Foundation of Shandong Province of ChinaInstitute startup grant from Qingdao University and the Shandong Center for Engineered Nonwovens(SCEN)

52102270ZR2021QE002

2024

10.1016/j.jechem.2024.01.044

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
  • 44