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您的检索式：作者名="Congli Sun"
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| 1 | Revealing structural degradation in layered structure oxides cathode of lithium ion batteries via in-situ transmission electron microscopy显示文摘Transition metal oxides with layered structure have been widely used as cathode materials for lithium-ion batteries(LIBs)which have relatively high energy density,large capacity and long life.However,in the long-term electrochemical cycle,the inevitable degradation of performance of LIBs due to structural degradation in cathodes severely restricts their large-scale practical applications.Understanding the underlying mechanism of structural degradation is the most critical scientific problem.Recently,in situ transmission electron microscopy(TEM)has become a useful tool to study the structural and compositional evolutions at atomic scale in electrochemical reactions,which provided a unique and in-depth understanding of the structural degradation.In this review,we discuss the recent advances in the in situ TEM,focusing on its role in revealing the structural degradation mechanisms in the four key places:(1)the interface between the cathodes and electrolyte;(2)the cathode surface;(3)the particle interior and(4)those induced by thermal effect.The insight gained by the in-situ TEM which is still developing at its fast pace is unique and expected to provide guidance for designing better layered cathode materials. | Fanjie Xia Weihao Zeng Haoyang Peng Hong Wang Congli Sun Ji Zou Jinsong Wu | 2023 | Journal of Materials Science & Technology2023，，23： | 1 |
| 2 | Phosphorus-doping-tuned PtNi concave nanocubes with high-index facets for enhanced methanol oxidation reaction显示文摘Surface engineering has been found to be an efficient strategy to boost the catalytic performance of noble-metal-based nanocatalysts.In this work,a small amount of P was doped to the surface of PtNi concave cube(P-PtNi CNC).Interestingly,the P-PtNi CNC nanocatalyst shows an enhanced methanol oxidation reaction(MOR)performance with achieving 8.19 times of specific activity than that of comercial Pt/C.The electrochemical in situ Fourier transform infrared spectroscopy(FTIR)results reveal that the surface P doping promotes the adsorption energy of OH,enhancing the resistance against CO poisoning.Therefore,the intermediate adsorbed CO(COads)reacted with adsorbed OH(OHads)through the Langmuir–Hinshelwood(LH)mechanism to generate CO_(2)and release surface active sites for further adsorption.This work provides a promising strategy via the incorporation of non-metallic elements into the PtNi alloys bounded with high-index facets(HIFs)as efficient fuel cell catalysts. | Aixin Fan Congli Qin Ruxia Zhao Haixiao Sun Hui Sun Xiaoping Dai Jin-Yu Ye Shi-Gang Sun Yanhong Lu Xin Zhang | 2022 | Nano Research2022，15，8： | 1 |
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