摘要
Aqueous ammonium ion battery(AAIB)is considered as a promising candidate for next-generation energy storage device,while the limited performance of cathode material retards its further development.Seeking novel materials and reveal the underlying energy storage reinforcement mechanism is necessary for promoting future commercial application of AAIB.Herein,a novel electrospun Ti_(3)C_(2)T_(x)@S-V_(2)O_(5)@CNF nanofiber is constructed by sulfur doping and Ti_(3)C_(2)T_(x)introduction strategy to exert the synergetic effect on NH_(4)^(+)storage capacity.Density functional theory calculations indicate that theinduction of Ti_(3)C_(2)T_(x)can redistribute the internal charges of material,induce the downshift of the d-band center of V atoms and p-band center of S atoms to the Fermi level,thus the adsorption energy of NH_(4)^(+)is optimized.Electrochemical results show that the Ti_(3)C_(2)T_(x)@S-V_(2)O_(5)@CNF electrode displays high capacity of 576.2 mAh g^(-1)at0.5 A g^(-1),long cycle life and superior rate performance.The assembled Ti_(3)C_(2)T_(x)@S-V_(2)O_(5)@CNF//PTCDI full cell also exhibits excellent electrochemical behavior including large specific capacity of 181 mAh g^(-1)at 0.5 A g^(-1),cycling stability of 10,000 cycles at 5 A g^(-1)with no capacity decay,and good rate performance.This work gives insight into the NH_(4)^(+)storage capacity control by rational local charge regulation through S doping and heterostructure construction to facilitate electron transfer for AAIBs and other energy storage system.
基金
financially supported by the National Natural Science Foundation of China(No.52406067)
Guang Dong Basic and Applied Basic Research Foundation(No.2023A1515110139)
Shenzhen Science and Technology Program(No.JCYJ20230807153607017)
the Sectorfor the National Natural Science Foundation of China(No.52105236)
the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.23JK0459)
the Natural Science Foundation of Shaanxi Province,China(Nos.2024JC-YBQN-0162 and2024JC-YBQN-0560)
Hubei Key Laboratory of Energy Storage and Power Battery(Hubei University of Automotive Technology)(No.ZDK22024B05)
the Key Laboratory of Functional Textile Material and Product,Ministry of Education(No.2024FTMP017)
the Open Project of Xi'an Key Laboratory of Advanced Optoelectronic Materials and Energy Conversion Devices(No.XJKFKT-2024-3)
the Open Research Project supported by State Key Laboratory for Mechanical Behavior of Materials(No.202325013)
