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Xiaomin Li

Bio: Xiaomin Li is an academic researcher from Nanchang University. The author has contributed to research in topics: Silicon & Materials science. The author has an hindex of 6, co-authored 31 publications receiving 127 citations.
Topics: Silicon, Materials science, Anode, Lithium, Coating

Papers
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TL;DR: Li et al. as mentioned in this paper constructed a 2D polar non-polar MoS2-graphene composites with poly(ethylene oxide) cross-linking to enable spatially regulated Li2S deposition.
Abstract: Layered MoS2–graphene nanocomposites with 2D polar–nonpolar amphoteric surfaces, which were used to confine sulfur for Li–S batteries, have been successfully fabricated through the assembly of polar MoS2 layers and nonopolar graphene with poly(ethylene oxide) cross-linking. Benefiting from the high conductivity of graphene and the strong chemical bonding between polar MoS2 and polysulfides, the MoS2–graphene composites not only ensure unimpeded electrical conducting to the insulating sulfur but also effectively entrap polysulfides therein. The ex situ study further reveals that the MoS2–graphene composites enable spatially regulated Li2S deposition by the preferential deposition of solid Li2S product onto the polar MoS2 layers, making a large amount of fast electron transport paths exposed on graphene for further sulfur reduction. Therefore, the obtained MoS2–sulfur–graphene nanocomposites present excellent rate performance and cycling stability with high reversible capacities of 895 mA h g–1 at 0.2 C aft...

37 citations

Journal ArticleDOI
Fugen Sun1, Bo Zhang1, Hao Tang1, Zhihao Yue1, Xiaomin Li1, Chuanqiang Yin1, Lang Zhou1 
TL;DR: In this paper, a stable cathode material in a conventional carbonate-based electrolyte for high-energy lithium-chalcogen batteries was successfully fabricated by homogeneously confining heteroatomic TexS1−x molecules into ordered mesoporous carbon CMK-3 via a facile melt-impregnation route.
Abstract: A stable cathode material in a conventional carbonate-based electrolyte for high-energy lithium–chalcogen batteries was successfully fabricated by homogeneously confining heteroatomic TexS1−x molecules into ordered mesoporous carbon CMK-3 via a facile melt-impregnation route. The Te–S bonds in the heteroatomic TexS1−x molecules endow them with higher intrinsic electrical conductivity and electrochemical reaction activity with Li than the homoatomic S8 molecules. Moreover, Te-containing polychalcogenide intermediates could induce the formation of solid electrolyte interphase (SEI) layers on the TexS1−x/CMK-3 surfaces in the carbonate-based electrolyte, which efficiently prevent polychalcogenides from the shuttle effect and side reactions with the carbonate solvent. With further assistance of mesopore confinement of CMK-3, the TexS1−x/CMK-3 composites can be reversibly charged and discharged in the carbonate-based electrolyte with long cycling stability and high rate capability. Therefore, the Te0.1S0.9/CMK-3 composite with an optimal Te/S mole ratio of 1/9 maintains high reversible capacities of 845 mA h g−1 after 100 cycles at 250 mA g−1 and 485 mA h g−1 after 500 cycles at 1 A g−1. These encouraging results suggest that the heteroatomic TexS1−x molecule/C composite could be a promising cathode material for long cycle life and high power density lithium batteries.

30 citations

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TL;DR: In this paper, a new type of aqueous aluminide ceramic coating polyethylene (ACP) separators is prepared by a simple spreader coating process using aluminum oxide (Al2O3) and boehmite (AlOOH) as the ceramic coating particles.

25 citations

Journal ArticleDOI
TL;DR: In this article, a uniform Se coating layer on the selenophilic surface of the Ni-rich layered metal oxide (LNCM) cathode material was constructed via a facile melt-diffusion approach.
Abstract: A novel and uniform Se coating layer on the selenophilic surface of the Ni-rich layered metal oxide (LNCM) cathode material was constructed via a facile melt-diffusion approach. The high selenophilicity of the LNCM surfaces should attribute to the strong interactions of the exposed Ni, Co, and Mn atoms with Se coating through the formation of metal–Se bonds, resulting in the conformal and homogenous deposition of Se layers. The uniform Se coating layers could not only protect the Ni-rich LNCM cathode materials from the side reaction with the electrolytes but also reduce the degree of Li+/Ni2+ cation disorder. Therefore, owing to the multifunctional effects of Se coating, the Se-coated LNCM811 cathode materials exhibit excellent cyclic stability and rate performances with a high initial capacity of 205 mA h g–1 at 0.2 C and the high reversible capacities of 173 mA h g–1 at the 100th cycle at 0.2 C, 132 mA h g–1 at 200th cycle at 2 C, and 103 mA h g–1 at 300th cycle at 5 C. This present work indicates that the Se coating on the advanced Ni-rich layered metal oxide cathode material through the facile melt-diffusion approach should be promising for the high performance Li-ion battery.

19 citations

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TL;DR: In this paper, a boehmite (AlOOH) nanowhiskers/polyethylene (PE) separator was initially prepared by the AlOOH nanowiskers coating on the commercial PE separator using dip-coating method.

19 citations


Cited by
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Journal ArticleDOI
TL;DR: A comprehensive review of the relationship between Coulombic efficiency (ICE) and energy density can be found in this paper, where a detailed assessment of the reasons of the initial capacity loss (low ICE) for various types of anode materials.

224 citations

Journal ArticleDOI
TL;DR: In this article, a review of metal-based nanostructured materials and their applications in Li-S batteries is presented, focusing on the relationship between the intrinsic properties of metal and the interaction with lithium (poly)sulfides and the subsequent effect on the battery performance.
Abstract: Since the resurgence of interest in lithium–sulfur (Li–S) batteries at the end of the 2000s, research in the field has grown rapidly. Li–S batteries hold great promise as the upcoming post-lithium-ion batteries owing to their notably high theoretical specific energy density of 2600 W h kg−1, nearly five-fold larger than that of current lithium-ion batteries. However, one of their major technical problems is found in the shuttling of soluble polysulfides between the electrodes, resulting in rapid capacity fading and poor cycling stability. This review spotlights the foremost findings and the recent progress in enhancing the electrochemical performance of Li–S batteries by using nanoscaled metal compounds and metals. Based on an overview of reported functional metal-based materials and their specific employment in certain parts of Li–S batteries, the underlying mechanisms of enhanced adsorption and improved reaction kinetics are critically discussed involving both experimental and computational research findings. Thus, material design principles and possible interdisciplinary research approaches providing the chance to jointly advance with related fields such as electrocatalysis are identified. Particularly, we elucidate additives, sulfur hosts, current collectors and functional interlayers/hybrid separators containing metal oxides, hydroxides and sulfides as well as metal–organic frameworks, bare metal and further metal nitrides, metal carbides and MXenes. Throughout this review article, we emphasize the close relationship between the intrinsic properties of metal-based nanostructured materials, the (electro)chemical interaction with lithium (poly)sulfides and the subsequent effect on the battery performance. Concluding the review, prospects for the future development of practical Li–S batteries with metal-based nanomaterials are discussed.

185 citations

Journal ArticleDOI
TL;DR: In this article, the authors highlight the importance of cathode density, sulfur content, electroactivity in achieving high energy densities, and provide a future outlook for enhancing both gravimetric energy density and WG of Li-S batteries.
Abstract: Lithium-sulfur (Li-S) batteries hold the promise of the next generation energy storage system beyond state-of-the-art lithium-ion batteries. Despite the attractive gravimetric energy density (WG ), the volumetric energy density (WV ) still remains a great challenge for the practical application, based on the primary requirement of Small and Light for Li-S batteries. This review highlights the importance of cathode density, sulfur content, electroactivity in achieving high energy densities. In the first part, key factors are analyzed in a model on negative/positive ratio, cathode design, and electrolyte/sulfur ratio, orientated toward energy densities of 700 Wh L-1 /500 Wh kg-1 . Subsequently, recent progresses on enhancing WV for coin/pouch cells are reviewed primarily on cathode. Especially, the "Three High One Low" (THOL) (high sulfur fraction, high sulfur loading, high density host, and low electrolyte quantity) is proposed as a feasible strategy for achieving high WV , taking high WG into consideration simultaneously. Meanwhile, host materials with desired catalytic activity should be paid more attention for fabricating high performance cathode. In the last part, key engineering technologies on manipulating the cathode porosity/density are discussed, including calendering and dry electrode coating. Finally, a future outlook is provided for enhancing both WV and WG of the Li-S batteries.

136 citations

Journal ArticleDOI
TL;DR: In this paper, a three-dimensional porous graphene/MoS2 hybrid is synthesized through a facile spray-drying approach, which is constructed with two-dimensional N-doped graphene nanosheets wrapping one-dimensional nanotubes self-assembled by vertically oriented few-layered 1T-MoS 2.

101 citations

Journal ArticleDOI
TL;DR: Li et al. as mentioned in this paper used Te as eutectic accelerator in S@pPAN to accelerate the redox conversion and prevent polysulfides dissolution under "dissolution-deposition" mechanism.

91 citations