Journal Article10.1002/SMLL.201703850
Graphene Scroll-Coated α-MnO2 Nanowires as High-Performance Cathode Materials for Aqueous Zn-Ion Battery.
Buke Wu,Guobin Zhang,Mengyu Yan,Mengyu Yan,Tengfei Xiong,Pan He,Liang He,Liang He,Xu Xu,Liqiang Mai +9 more
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TL;DR: A two-step intercalation mechanism that Zn ions first insert into the layers and then the tunnels of MnO2 framework is proved by in situ X-ray diffraction, galvanostatic intermittent titration technique, andX-ray photoelectron spectroscopy characterizations.
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Abstract: The development of manganese dioxide as the cathode for aqueous Zn-ion battery (ZIB) is limited by the rapid capacity fading and material dissolution. Here, a highly reversible aqueous ZIB using graphene scroll-coated α-MnO2 as the cathode is proposed. The graphene scroll is uniformly coated on the MnO2 nanowire with an average width of 5 nm, which increases the electrical conductivity of the MnO2 nanowire and relieves the dissolution of the cathode material during cycling. An energy density of 406.6 Wh kg-1 (382.2 mA h g-1 ) at 0.3 A g-1 can be reached, which is the highest specific energy value among all the cathode materials for aqueous Zn-ion battery so far, and good long-term cycling stability with 94% capacity retention after 3000 cycles at 3 A g-1 are achieved. Meanwhile, a two-step intercalation mechanism that Zn ions first insert into the layers and then the tunnels of MnO2 framework is proved by in situ X-ray diffraction, galvanostatic intermittent titration technique, and X-ray photoelectron spectroscopy characterizations. The graphene scroll-coated metallic oxide strategy can also bring intensive interests for other energy storage systems.
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Citations
ZnMn3O7:A New Layered Cathode Material for Fast-Charging Zinc-Ion Batteries
Ruitao Sun,Qin Liu,Wenzhuo Deng +2 more
TL;DR: Researchers develop ZnMn3O7, a new layered cathode material for zinc-ion batteries, exhibiting superior cycling stability, ultrafast-charging capability, and high power density, with a capacity of 170 mAh/g and 72.9% capacity retention over 400 cycles.
In-situ formation of ultrafine ZnMn2O4-MnOOH composite nanoparticles embedded into porous carbon nanospheres for stable aqueous zinc-ion batteries
Hong-Jie Jia,Yanxin Li,Usman Ali,Yiqian Li,Yuehan Hao,Bin Liu,Chungang Wang,Lu Li,Heng-guo Wang +8 more
TL;DR: In this paper , the ultrafine ZnO-MnO composite nanoparticles embedded into porous carbon nanospheres as a composite cathode material were used for rechargeable aqueous zinc ion batteries.
The progress of cathode materials in aqueous zinc-ion batteries
Xinchi Zhou,Shan Jiang,Siao Zhu,Shuangfei Xiang,Zhen Yu Zhang,Xian-yi Xu,Yuanyuan Xu,Jian Zhou,Suchong Tan,Zhengdao Pan,Xingyou Rao,Yutong Wu,Zhoulu Wang,Xiang Liu,Yi Zhang,Yunlei Zhou +15 more
TL;DR: The progress of cathode materials in aqueous zinc-ion batteries focuses on improving energy density and cycling life while maintaining safety, cost-effectiveness, and environmental friendliness.
Hydrogen Peroxide Tuned Morphology and Crystal Structure of Barium Vanadate-Based Nanostructures for Aqueous Zinc-Ion Storage Properties.
TL;DR: The morphology and crystal structure of BVO nanostructures are tuned by H2 O2 concentration, improving the layered-structure stability and suppressing V dissolution, thereby enhancing the electrochemical stability of V-based cathodes for AZIBs.
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