Severe acute respiratory syndrome （SARS） first emerged in Guangdong on November 16, 2002, and subsequently spread to Hong Kong, Beijing, Taiwan, and other areas. According to WHO, 8 098 cases were reported in 29 cou...Severe acute respiratory syndrome （SARS） first emerged in Guangdong on November 16, 2002, and subsequently spread to Hong Kong, Beijing, Taiwan, and other areas. According to WHO, 8 098 cases were reported in 29 countries.l＇2 Although researchers around the world have been carrying out extensive studies for 10 years, the reservoir of SARS coronavirus （CoV） has not been found. 1,3-18展开更多
Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electroch...Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electrochemical properties.However,their long-term reversibility is still in great suspense.Considering the decisive effect of the structure and morphology on theα-MnO2 materials,hierarchicalα-MnO2 materials would be promising to improve the cycle performance of AZIB.Here,we synthesized theα-MnO2 urchin-like microspheres(AUM)via a self-assembled method.The porous microspheres composed of one-dimensionalα-MnO2 nanofibers with high crystallinity,which improved the surface area and active sites for Zn2+intercalation.The AUM-based AZIB realized a high initial capacity of 308.0 mA hg-1,and the highest energy density was 396.7 W hkg-1.The kinetics investigation confirmed the high capacitive contribution and fast ion diffusion of the AUM.Ex-situ XRD measurement further verified the synergistic insertion/extraction of H+and Zn2+ions during the charge/discharge process.The superiority of the AUM guaranteed good electrochemical performance and reversible phase evolution,and this application would promote the follow-up research on the advanced AZIB.展开更多
基金This work was supported by grants from the National Natural Science Foundation of China （No. 81373059 and 81172731）.
文摘Severe acute respiratory syndrome （SARS） first emerged in Guangdong on November 16, 2002, and subsequently spread to Hong Kong, Beijing, Taiwan, and other areas. According to WHO, 8 098 cases were reported in 29 countries.l＇2 Although researchers around the world have been carrying out extensive studies for 10 years, the reservoir of SARS coronavirus （CoV） has not been found. 1,3-18
基金supported by the National Key Research and Development Program of China(2016YFA0202400)the 111 Project(B16016)+1 种基金the National Natural Science Foundation of China(51702096,U1705256 and 51572080)the Fundamental Research Funds for the Central Universities(2018ZD07 and JB2019132)。
文摘Aqueous Zn-ion batteries(AZIBs)are one of the promising battery technologies for the green energy storage and electric vehicles.As one attractive cathode material for AZIBs,α-MnO2 materials exhibit superior electrochemical properties.However,their long-term reversibility is still in great suspense.Considering the decisive effect of the structure and morphology on theα-MnO2 materials,hierarchicalα-MnO2 materials would be promising to improve the cycle performance of AZIB.Here,we synthesized theα-MnO2 urchin-like microspheres(AUM)via a self-assembled method.The porous microspheres composed of one-dimensionalα-MnO2 nanofibers with high crystallinity,which improved the surface area and active sites for Zn2+intercalation.The AUM-based AZIB realized a high initial capacity of 308.0 mA hg-1,and the highest energy density was 396.7 W hkg-1.The kinetics investigation confirmed the high capacitive contribution and fast ion diffusion of the AUM.Ex-situ XRD measurement further verified the synergistic insertion/extraction of H+and Zn2+ions during the charge/discharge process.The superiority of the AUM guaranteed good electrochemical performance and reversible phase evolution,and this application would promote the follow-up research on the advanced AZIB.
