Bifunctional lithiophilic carbon fibers with hierarchical structure for high-energy lithium metal batteries

Lyu, Taiyu; Luo, Fenqiang; Wang, Zhen; Fu-ting, Jiang; Geng, Shize; Zhuang, Yan; Lin, Xin; Chen, Junkai; Wang, Dechao; Bu, Lingzheng; Tao, Lei; Liang, Lizhe; Zheng, Zhifeng

doi:10.1016/j.cej.2023.143357

Cited by 11 publications

(4 citation statements)

References 53 publications

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“…Since then, many researchers have used Sand time to characterize and determine the appearance of dendrites. [65,[125][126] Bai et al observed the electrodeposition morphology of lithium metal in glass capillaries by in situ optical microscopy, and found that a bunch of dendrites with obvious tip growths would appear when the lithium salt on the surface of the negative electrode was depleted, which also confirms the conclusion of Sand. [127] However, the reduction of the surface concentration to zero corresponds only to the concentration gradient reaching its maximum value and the limiting diffusion current density, i. e., the diffusion rate reaching its maximum value, when the dendrites grow the fastest and are more easily observed.…”

Section: Mass Transfer Stepmentioning

confidence: 73%

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Lithium Metal Anode in Electrochemical Perspective

Wang,

Wu,

Yao

et al. 2024

ChemElectroChem

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Lithium metal is a possible anode material for building high energy density secondary batteries, but its problems during cycling have hindered the commercialization of lithium metal secondary batteries. Until now, many sophisticated techniques have been used to obtain rich micro‐morphological and physicochemical information of the deposition layer and the solid electrolyte interface (SEI), and to develop improvement strategies based on the information and achieve remarkable results. Regulating the reaction process around key links is a classic strategy to achieve expected results. Based on this empirical fact, we artificially highlighted the differences in the apparent performance of lithium metal anode using different series of electrolytes. We used microelectrode technology to analyze the reaction mechanisms and kinetic characteristics of each elementary step under all electrolyte conditions, revealing common laws that affect apparent performance and the basic steps that have a decisive impact on apparent performance. We discussed and elucidated the relevant physical and chemical principles, providing a clear basis for improving the pertinence and efficiency of improvement strategies.

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Section: Mass Transfer Stepmentioning

confidence: 73%

“…The time required for him to reduce the initial concentration of ions to zero is called the Sand time. Since then, many researchers have used Sand time to characterize and determine the appearance of dendrites [65,125–126] . Bai et al.…”

Section: Electrochemical Strategiesmentioning

confidence: 99%

Lithium Metal Anode in Electrochemical Perspective

Wang,

Wu,

Yao

et al. 2024

ChemElectroChem

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“…From the second to fifth cycles, the CV curves exhibited excellent overlap, demonstrating the favorable electrochemical reversibility of NiCo-N-C-2 CNTs . NiCo NPs enhanced the catalytically active sites of the electrode materials, increased the lithium adsorption capacity, and facilitated lithium embedding and removal . Also, the formation of NiCo NPs improves the electronic structure of the primary N-doped carbon and enhances the Li affinity of the composites, in addition to the nanostructural advantages of the composites.…”

Section: Results and Discussionmentioning

confidence: 91%

NiCo Nanoparticles Encapsulated in Nitrogen-Doped Carbon Tubes as Anode Materials for High-Performance Lithium-Ion Batteries

Cao,

Wu,

Guo

et al. 2024

ACS Sustainable Chem. Eng.

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A novel solution has been proposed in this study to address electrode chalking and capacity degradation issues associated with transition metals as anodic materials in Li-ion batteries. The new strategy is based on constructing nitrogen-doped carbon shell-covered transition metal nanoparticles. In this study, the design of onedimensional nanotubes and the introduction of nitrogen atoms improve electronic conductivity and electrode integrity and also provide abundant active sites for lithium-ion battery reactions. In the first step, carbon-coated NiCo compounds were synthesized by using acetate ions as the carbon source and Ni and Co as the metal sources. Subsequently, nitrogen-doped carbon CNT-encapsulated NiCo nanoparticles (NiCo-N-C-1, NiCo-N-C-2, and NiCo-N-C-3) were successfully prepared by utilizing the precursors from the first step and using melamine as the nitrogen source for introducing nitrogen atoms. The unique one-dimensional nanotube structure of NiCo-N-C-2 anodes demonstrated a discharge capacity equal to 639.4 mAh g −1 following 300 cycles at a current density (I d ) equal to 0.5 A g −1 with an extended reversible capacity equal to 442.5 mAh g −1 following 1400 cycles at I d = 2 A g −1 , demonstrating the potential application of NiCo-N-C-2 nanotubes in Li-ion batteries with a high power density and an extended cycle life. Moreover, as it was coupled with the LiFePO 4 cathode, the prepared Li-ion full cell demonstrated a capacity retention equal to 91.4% following 500 cycles at I d = 1 C (0.1 C=170 mA h g −1 ), further highlighting the high capacity, excellent multiplication, and cycling performance of the NiCo-N-C electrode. This simple synthesis strategy offers a new approach to fabricating high-performance carbon and nitrogen-clad metal particle composites with promising applications in various energy-related fields.

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“…6–10 The rapid development and widespread adsorption of technologies such as solar power, wind power, hydropower, and biomass energy have played an important role in decreasing greenhouse gas emissions and mitigating climate change. 11–15 Therefore, highly efficient energy storage technologies, such as advanced batteries, fuel cells, and other energy storage systems, can enhance the utilization and management of renewable energy sources and enable their seamless integration into existing grid systems. 16–22…”

Section: Introductionmentioning

confidence: 99%