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
Synergistic design of Mn-based oxide and carbonaceous hybrids for aqueous zinc-ion batteries: Mechanistic insights and material advances
Sanath Kumar,Ezhilarasan Murugesan,Yen-Pei Fu +2 more
Carbon nanohorns/nanotubes: An effective binary conductive additive in the cathode of high energy-density zinc-ion rechargeable batteries
Yuan Huang,Zixuan Li,Shunyu Jin,Shengdong Zhang,Haolan Wang,Pritesh Hiralal,Gehan A. J. Amaratunga,Hang Zhou +7 more
TL;DR: In this paper, a binary conductive additive, a combination of carbon nanohorns (CNHs) and carbon nanotubes (CNTs), is added into the MnO2 electrode to establish high-speed electron-channels in the CNTs/cNHs network with an efficient "line-to-surface-topoint" microstructure.
Copper-doped manganese tetroxide composites with excellent electrochemical performance for aqueous zinc-ion batteries
Dong Li,Zi-Rui Wang,Yong-Mei Xia,Qing-Li Gao,Manman Ren,Weiliang Liu,Fangong Kong,Shoujuan Wang,Song-Hao Li +8 more
TL;DR: A copper-doped manganese tetroxide (Cu-Mn3O4) composites were prepared for zinc-ion batteries cathode material through a facile synthesis route as mentioned in this paper.
Graphdiyne Hybrid Nanowall Arrays for High-capacity Aqueous Rechargeable Zinc Ion Battery
TL;DR: In this paper, a graph-diyne-wrapped K0.25·MnO2(K 0.25/MmO2@GDY) hybrid nanowall arrays were used as the cathode of aqueous rechargeable zinc ion battery.
Graphene oxide wrapped ZnMnO 3 nanorod as advanced cathode for aqueous zinc ion batteries
TL;DR: In this paper , a graphene oxide wrapped ZnMnO3 nanorod (ZMO/GO) is successfully prepared and employed as cathode in ZIBs, which demonstrates favorable special capacity of 174.8 mAh g−1 at a current density of 0.1 A g− 1 and sufficient stability at 2 A g − 1.
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