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Your search keyword '"Guo, Xiaoniu"' showing total 16 results
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16 results on '"Guo, Xiaoniu"'

5. Interface‐Compatible Gel‐Polymer Electrolyte Enabled by NaF‐Solubility‐Regulation toward All‐Climate Solid‐State Sodium Batteries.

Author

Guo, Xiaoniu, Xie, Zhengkun, Wang, Ruixue, Luo, Jun, Chen, Jiacheng, Guo, Shuai, Tang, Guochuan, Shi, Yu, and Chen, Weihua

Subjects
*ELECTROLYTES, *SODIUM, *SURFACE tension, *SOLID state batteries, *CATHODES, *STORAGE batteries, *ELECTRIC batteries, *SUPERIONIC conductors
Abstract

Gel‐polymer electrolyte (GPE) is a pragmatic choice for high‐safety sodium batteries but still plagued by interfacial compatibility with both cathode and anode simultaneously. Here, salt‐in‐polymer fibers with NaF salt inlaid in polylactide (PLA) fiber network was fabricated via electrospinning and subsequent in situ forming gel‐polymer electrolyte in liquid electrolytes. The obtained PLA‐NaF GPE achieves a high ion conductivity (2.50×10−3 S cm−1) and large Na+ transference number (0.75) at ambient temperature. Notably, the dissolution of NaF salt occupies solvents leading to concentrated‐electrolyte environment, which facilitates aggregates with increased anionic coordination (anion/Na+ >1). Aggregates with higher HOMO realize the preferential oxidation on the cathode so that inorganic‐rich and stable CEI covers cathode' surface, preventing particles' breakage and showing good compatibility with different cathodes (Na3V2(PO4)3, Na2+2xFe2‐x(SO4)3, Na0.72Ni0.32Mn0.68O2, NaTi2(PO4)3). While, passivated Na anode induced by the lower LUMO of aggregates, and the lower surface tension between Na anode and PLA‐NaF GPE interface, leading to the dendrites‐free Na anode. As a result, the assembled Na || Na3V2(PO4)3 cells display excellent electrochemical performance at all‐climate conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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13. Hydraulic Gradient Comparison Method to Estimate Aquifer Hydraulic Parameters Under Steady-State Conditions

Author

Guo, Xiaoniu and Zhang, Chuan-Mian

Subjects
Water, Underground -- Measurement, Groundwater flow -- Measurement, Earth sciences, Measurement
Abstract

Xiaoniu Guo [a] Chuan-Mian Zhang [b] Abstract The hydraulic gradient comparison method is an inverse method for estimation of aquifer hydraulic conductivity (or transmissivity) and boundary conductance for a ground [...]

Published
2000

15. Simulation of pit closure alternatives for an open pit mine.

Author

Pavlik H.F., Tailings and Mine Waste '95 Fort Collins, Colorado 17-Jan-9520-Jan-95, Baker F.G., Guo Xiaoniu, Voorhees J.S., Pavlik H.F., Tailings and Mine Waste '95 Fort Collins, Colorado 17-Jan-9520-Jan-95, Baker F.G., Guo Xiaoniu, and Voorhees J.S.

Abstract

A numerical groundwater flow model and particle tracking module were developed for the design of a mine dewatering systems and prediction of post-closure hydrogeologic conditions in a series of mine pits proposed in a Tertiary basalt flow sequence in the western USA. Two general pit closure alternatives were evaluated: one allowing groundwater levels to recover to a new equilibrium leading to the formation of lakes in the two deepest pits; the other requiring backfilling of the pit bottoms with permeable materials to prevent ground water from rising above the upper surface of the backfill. Results show that there is a tradeoff to be achieved between the use of hydraulic controls and geochemical controls. If backfilling is used, groundwater will flow outward establishing a potential pathway for the migration of contaminants; if the mine pits are left open, flow from adjacent springs will be adversely affected, and a local reversal in groundwater gradients will direct groundwater into the lakes formed in the open pits., A numerical groundwater flow model and particle tracking module were developed for the design of a mine dewatering systems and prediction of post-closure hydrogeologic conditions in a series of mine pits proposed in a Tertiary basalt flow sequence in the western USA. Two general pit closure alternatives were evaluated: one allowing groundwater levels to recover to a new equilibrium leading to the formation of lakes in the two deepest pits; the other requiring backfilling of the pit bottoms with permeable materials to prevent ground water from rising above the upper surface of the backfill. Results show that there is a tradeoff to be achieved between the use of hydraulic controls and geochemical controls. If backfilling is used, groundwater will flow outward establishing a potential pathway for the migration of contaminants; if the mine pits are left open, flow from adjacent springs will be adversely affected, and a local reversal in groundwater gradients will direct groundwater into the lakes formed in the open pits.

Published
1995

16. Emerging Advanced Photo‐Rechargeable Batteries.

Author

Yang, Mingrui, Wang, Denghui, Ling, Yunhua, Guo, Xiaoniu, and Chen, Weihua

Subjects
*SOLAR energy conversion, *ENERGY conversion, *CHEMICAL energy, *SOLAR cells, *SOLAR energy
Abstract

The depletion of fossil fuels necessitates the efficient utilization of solar energy and the urgent resolution of its instability, intermittency, and storage challenges. Photo‐rechargeable batteries, which integrate solar cells and energy storage batteries to convert solar energy into electricity and store it as chemical energy, have gradually emerged as a novel research direction to meet the energy demands of various standalone applications such as building facades, mobile transportation devices, and outdoor settings. This review elucidates the device structure, working principles, and key parameters of photo‐rechargeable batteries. Furthermore, various photo‐rechargeable battery systems such as lithium‐ion battery, lithium‐sulfur battery, sodium‐ion battery, zinc‐ion battery, and aluminum‐ion battery are categorized and summarized, detailing their composition, operational mechanisms, and photoelectric performance. Finally, the future research directions of photo‐rechargeable batteries are delineated, advocating for the exploration of dual‐functional materials that integrate light conversion and energy storage. Specifically, emphasis is placed on studying the compatibility between optical and energy storage materials, investigating new battery operation mechanisms under illumination conditions, considering the imperative of achieving high stability and overall efficiency to enhance device performance, and elucidating the future application pathways of these technologies. [ABSTRACT FROM AUTHOR]

Published
2024
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