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28. An alginic acid assisted rheological phase synthesis of carbon coated Li3V2(PO4)(3) with high-rate performance

Author

Wu, Yue, Tang, Zhiyuan, Guo, Xuyun, Du, Chenqiang, Zhang, Xinhe, Wu, Yue, Tang, Zhiyuan, Guo, Xuyun, Du, Chenqiang, and Zhang, Xinhe

Abstract

A nanoscaled Li3V2(PO4)(3)/C(LVP/C) composite is successfully synthesized via a modified rheological phase method. Alginic acid is applied as a new carbon source and ethylene glycol is used as the dispersant, and both of which play multifaceted roles during the synthetic route. A series of intensive investigations shows that the LVP/C composite possesses a three-dimensional carbon network and a loose structure, which provide discontinuous electronic and ionic pathways. The electrochemical performance of the LVP/C cathode is revealed to be impressive in terms of capacity, high-rate capability and long-life cycleability. Between 3.0 and 4.3 V, it delivers a discharge capacity of 132.3 mAh g(-1) at 0.5 degrees C rate, approaching the theoretical value, and can cycle at a rate as high as 40 C without obvious capacity fading. Most distinctively, when discharged at 90 C ultrahigh rate (charged at 5 C rate), the largest capacity of 61.4 mAh g(-1), can still be available, after 600 cycles the capacity retention can still maintain 76%. When operated within 3.0-4.8 V, it cannot only discharge the initial capacity of 184.1 mAh g(-1) at 0.1 degrees C, but also exhibit a stable cycling performance at 20 C for 400 cycles. These excellent performances can be fundamentally attributed to the high electronic/ionic conductivities which are related closely to the modified rheological phase preparation route and the promising new carbon source. (C) 2014 Elsevier B.V. All rights reserved.

Published
2014

34. Improvement of electrochemical performance for Li3V2(PO4)3/C electrode using LiCoO2 as an additive.

Author

Wang, Lijuan, Du, Chenqiang, Tang, Zhiyuan, Zhang, Xinhe, and Xu, Qiang

Subjects
*ELECTROCHEMISTRY, *LITHIUM compounds, *CARBON electrodes, *COMPOSITE materials, *ADDITIVES, *MICROFABRICATION
Abstract

Highlights: [•] The electrochemical performance of Li3V2(PO4)3/C is improved via a simple way. [•] LiCoO2 is beneficial to the electrochemical performance of Li3V2(PO4)3/C composite. [•] The Li3V2(PO4)3/LiCoO2/C electrode exhibits excellent electrochemical performance. [•] Modifying the fabrication of LVP electrode improves its electrochemical performance. [•] The modifying method is different from the methods previously reported for LVP. [ABSTRACT FROM AUTHOR]

Published
2013
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36. Insights Into the Molecular Interactions of MIC2 and M2AP: Role of TSR6 and Conservation Across Species.

Author

Xia X, Du C, Wang Y, and Song G

Abstract

Microneme protein 2 (MIC2) and its associated protein M2AP are pivotal for the gliding motility and host cell invasion by Toxoplasma gondii. In our prior work, we showed that M2AP binds specifically to the sixth TSR domain of MIC2, with this interaction mediated dominantly by the hotspot residue H620 situated at the center of TSR6. To delve deeper into the functional significance of H620 and explore the dynamic behavior of Y602, we conducted molecular dynamic (MD) simulations of the Toxoplasma TSR6-M2AP complex, encompassing both wild-type and mutant forms. Our findings underscore the critical role of H620 within TSR6, particularly its hydrogen bond interaction with K72 of M2AP. The H620A mutation disrupts the nearby hydrophobic network while minimally affecting other hydrophilic interactions. Furthermore, our data reveal a highly conserved binding pose between M2AP and TSR6 across different species, consistent with previous trans-genera studies, thereby offering insights for future strategies in infection control development., (© 2024 Wiley Periodicals LLC.)

Published
2024
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