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您的检索式：作者名="Chengyang Ji"
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| 1 | Ultrasmall NiS_(2)Nanocrystals Embedded in Ordered Macroporous Graphenic Carbon Matrix for Efficiently Pseudocapacitive Sodium Storage显示文摘Sodium-ion hybrid capacitor(SIHC)is one of the most promising alternatives for large-scale energy storage due to its high energy and power densities,natural abundance,and low cost.However,overcoming the imbalance between slow Na^(+)reaction kinetics of battery-type anodes and rapid ion adsorption/desorption of capacitive cathodes is a significant challenge.Here,we propose the high-rate-performance NiS_(2)@OMGC anode material composed of monodispersed NiS_(2) nanocrystals(8.8±1.7 nm in size)and N,S-co-doped graphenic carbon(GC).The NiS_(2)@OMGC material has a three-dimensionally ordered macroporous(3DOM)morphology,and numerous NiS_(2) nanocrystals are uniformly embedded in GC,forming a core-shell structure in the local area.Ultrafine NiS_(2) nanocrystals and their nano-microstructure demonstrate high pseudocapacitive Na-storage capability and thus excellent rate performance(355.7 mAh/g at 20.0 A/g).A SIHC device fabricated using NiS_(2)@OMGC and commercial activated carbon(AC)cathode exhibits ultrahigh energy densities(197.4 Wh/kg at 398.8 W/kg)and power densities(43.9 kW/kg at 41.3 Wh/kg),together with a long life span.This outcome exemplifies the rational architecture and composition design of this type of anode material.This strategy can be extended to the design and synthesis of a wide range of high-performance electrode materials for energy storage applications. | Zhaozhao Liu Jiang Wang Ran Bi Pinyi Zhao Mengqian Wu Xinyu Liu Likun Yin Chengyang Wang Mingming Chen Kemeng Ji | 2023 | Transactions of Tianjin University2023，29，2： | 0 |
| 2 | Genetic differentiation and diversity of SARS-CoV-2 Omicron variant in its early outbreak显示文摘The recently emerged Omicron variant of severe acute respiratory syndrome coronavirus 2(SARS‐CoV‐2)has quickly spread around the world.Although many consensus mutations of the Omicron variant have been recognized,little is known about its genetic variation during its transmission in the population.Here,we comprehensively analyzed the genetic differentiation and diversity of the Omicron variant during its early outbreak.We found that Omicron achieved more structural variations,especially deletions,on the SARS‐CoV‐2 genome than the other four variants of concern(Alpha,Beta,Gamma,and Delta)in the same timescale.In addition,the Omicron variant acquired,except for 50 consensus mutations,seven great new non‐synonymous nucleotide substitutions during its spread.Three of them are on the S protein,including S_A701V,S_L1081V,and S_R346K,which belong to the receptor‐binding domain(RBD).The Omicron BA.1 branch could be divided into five divergent groups spreading across different countries and regions based on these seven novel mutations.Furthermore,we found that the Omicron variant possesses more mutations related to a faster transmission rate than the other SARS‐CoV‐2 variants by assessing the relationship between the genetic diversity and transmission rate.The findings indicated that more attention should be paid to the significant genetic differentiation and diversity of the Omicron variant for better disease prevention and control. | Shenghui Weng Jingzhe Shang Yexiao Cheng Hangyu Zhou Chengyang Ji Rong Yang Aiping Wu | 2022 | Biosafety and Health2022，4，3： | 0 |
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