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| 1 | Surficial phase-identiafication and structural profiles from weathered natural pyrites: A grazing -incidence X-ray diffraction study显示文摘 | Cai Yuanfeng Pan Yuguan Xue Jiyue | 2009 | Applied Surface Science2009，255，： | 1 |
| 2 | High-performance LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) cathode by nanoscale lithium sulfide coating via atomic layer deposition显示文摘The commercialization of nickel-rich LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811) has been hindered by its continuous loss of practical capacity and reduction in average working voltage.To address these issues,surface modification has been well-recognized as an effective strategy.Different from the coatings reported in literature to date,in this work,we for the first time report a sulfide coating,amorphous Li_(2)S via atomic layer deposition (ALD).Our study revealed that the conformal nano-Li_(2)S coating shows exceptional protection over the NMC811 cathodes,accounting for the dramatically boosted capacity retention from~11.6%to~71%and the evidently mitigated voltage reduction from 0.39 to 0.18 V after 500 charge–discharge cycles.In addition,the Li_(2)S coating remarkably improved the rate capability of the NMC811 cathode.Our investigation further revealed that all these beneficial effects of the ALD-deposited nano-Li_(2)S coating lie in the following aspects:(i) maintain the mechanical integrity of the NMC811 electrode:(ii) stabilize the NMC electrode/electrolyte interface:and (iii) suppress the irreversible phase transition of NMC structure.Particularly,this study also has revealed that the nano-Li_(2)S coating has played some unique role not associated with traditional non-sulfide coatings such as oxides.In this regard,we disclosed that the Li_(2)S layer has reacted with the released O_(2) from the NMC lattices,and thereby has dramatically mitigated electrolyte oxidation and electrode corrosion.Thus,this study is significant and has demonstrated that sulfides may be an important class of coating materials to tackle the issues of NMCs and other layered cathodes in lithium batteries. | Xin Wang Jiyu Cai Yang Ren Mourad Benamara Xinwei Zhou Yan Li Zonghai Chen Hua Zhou Xianghui Xiao Yuzi Liu Xiangbo Meng | 2022 | Journal of Energy Chemistry2022，31，6： | 1 |
| 3 | Atomic-scale tuned interface of nickel-rich cathode for enhanced electrochemical performance in lithium-ion batteries显示文摘The Ni-rich layered LiNi_(0.6)Mn_(0.2)Co_(0.2)O_(2)(NMC622)is one promising cathode for lithium-ion batteries(LIBs),but suffers from poor cycling stability under high cutoff potentials.The performance degradation was reflected as capacity fading and voltage drop,having their roots in instable interface of NMC622.Aimed at improving interfacial stability,in this study,we deposited nanoscale ZrO_(2) coatings conformally over NMC622 cathodes using atomic layer deposition(ALD).We found that,under a high cutoff voltage(4.5 V),the ALD ZrO_(2) coatings evidently improved the performance of NMC622 cathode,showing better cyclability and higher sustainable capacity.In addition,the ALD coatings dramatically boosted the rate capability of NMC622.All these compelling performance results are ascribed to the atomic-scale tunable ZrO_(2) coatings via ALD,which create stable interface and thereby inhibit unfavorable evolutions.In the study,we utilize a suite of characterization tools and various analyses to clarify the effects of ALD ZrO_(2) coatings.This study will be helpful for improving the performance of nickel-rich cathodes via interfacial engineering using ALD. | Yongqiang Liu Xin Wang Jiyu Cai Xiaoxiao Han Dongsheng Geng Jianlin Li Xiangbo Meng | 2020 | Journal of Materials Science & Technology2020，54，19： | 1 |
| 4 | Architecture of SWI/SNF chromatin remodeling complex显示文摘Dear Editor, The SWI/SNF complex is a large ATP-dependent chromatin remodeling complex that is highly conserved from yeast to human,which is essential for transcription regulation, genomic stability,DNA repair and many aspects of development (Kasten et al.,2011).SWI/SNF contains more than 10subunits (M.W.>1MDa),including a DNA-dependent ATPase subunit and several accessory subunits.Mutations in several SWI/SNF subunits have been recently identified at a high frequency in a variety of cancers (Masliah-Planchon et al.,2015). | Zhihui Zhang Xuejuan Wang Jiyu Xin Zhenrui Ding Sheng Liu Qianglin Fang Na Yang Rui-min Xu Gang Cai | 2018 | Protein & Cell2018，9，12： | 0 |
| 5 | Unveiling the parasitic-reaction-driven surface reconstruction in Ni-rich cathode and the electrochemical role of Li_(2)CO_(3)显示文摘Nickel-rich transition-metal oxides are widely regarded as promising cathode materials for high-energydensity lithium-ion batteries for emerging electric vehicles. However, achieving high energy density in Ni-rich cathodes is accompanied by substantial safety and cycle-life obstacles. The major issues of Ni-rich cathodes at high working potentials are originated from the unstable cathode-electrolyte interface, while the underlying mechanism of parasitic reactions towards surface reconstructions of cathode materials is not well understood. In this work, we controlled the Li_(2)CO_(3) impurity content on LiNi_(0.83)Mn_(0.1)Co_(0.07)O_(2) cathodes using air, tank-air, and O_(2) synthesis environments. Home-built high-precision leakage current and on-line electrochemical mass spectroscopy experiments verify that Li_(2)CO_(3) impurity is a significant promoter of parasitic reactions on Ni-rich cathodes. The rate of parasitic reactions is strongly correlated to Li_(2)CO_(3) content and severe performance deterioration of Ni83 cathodes.The post-mortem characterizations via high-resolution transition electron microscope and X-ray photoelectron spectroscopy depth profiles reveal that parasitic reactions promote more Ni reduction and O deficiency and even rock-salt phase transformation at the surface of cathode materials. Our observation suggests that surface reconstructions have a strong affiliation to parasitic reactions that create chemically acidic environment to etch away the lattice oxygen and offer the electrical charge to reduce the valence state of transition metal. Thus, this study advances our understanding on surface reconstructions of Nirich cathodes and prepares us for searching for rational strategies. | Jiyu Cai Zhenzhen Yang Xinwei Zhou Bingning Wang Ana Suzana Jianming Bai Chen Liao Yuzi Liu Yanbin Chen Shunlin Song Xuequan Zhang Li Wang Xiangming He Xiangbo Meng Niloofar Karami Baasit Ali Shaik Sulaiman Natasha A.Chernova Shailesh Upreti Brad Prevel Feng Wang Zonghai Chen | 2023 | Journal of Energy Chemistry2023，，10： | 0 |
| 6 | Structural basis of allosteric regulation of Tel1/ATM kinase显示文摘ATM/Tel1 is an apical kinase that orchestrates the multifaceted DNA damage response. Mutations of ATM/Tel1 are associated with ataxia telangiectasia syndrome. Here, we report cryo-EM structures of symmetric dimer (4.1??) and asymmetric dimer (4.3??) of Saccharomyces cerevisiae Tel1. In the symmetric state, the side chains in Tel1 C-terminus (residues 1129–2787) are discernible and an atomic model is built. The substrate binding groove is completely embedded in the symmetric dimer by the intramolecular PRD and intermolecular LID domains. Point mutations in these domains sensitize the S. cerevisiae cells to DNA damage agents and hinder Tel1 activation due to reduced binding affinity for its activator Xrs2/Nbs1. In the asymmetric state, one monomer becomes more compact in two ways: the kinase N-lobe moves down and the Spiral of α-solenoid moves upwards, which resemble the conformational changes observed in active mTOR. The accessibility of the activation loop correlates with the synergistic conformational disorders in the TRD1-TRD2 linker, FATC and PRD domains, where critical post-translational modifications and activating mutations are coincidently condensed. This study reveals a tunable allosteric network in ATM/Tel1, which is important for substrate recognition, recruitment and efficient phosphorylation. | Jiyu Xin Zhu Xu Xuejuan Wang Yanhua Tian Zhihui Zhang Gang Cai | 2019 | Cell Research2019，29，8： | 0 |
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