Nitrogen‐Doped Amorphous Zn–Carbon Multichannel Fibers for Stable Lithium Metal Anodes

Fang, Yongjin; Zeng, Yinxiang; Jin, Qi; Lu, Xingwen; Luan, Deyan; Zhang, Xitian; Lou, Xiong Wen David

doi:10.1002/anie.202100471

Cited by 139 publications

(78 citation statements)

References 48 publications

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“…[ 2,31,32 ] Recently, a variety of strategies have been proposed to regulate the surface chemistry of carbon hosts via heteroatom‐doping, incorporation of lithiophilic sites, decoration of functional groups and so on. [ 21,25,33–36 ] However, integration of surface engineering strategies into the hollow carbon hosts is still at the infancy stage and the detailed working mechanism and morphological/compositional regulation strategy are still unclear. [ 37–39 ]…”

Section: Introductionmentioning

confidence: 99%

Lotus‐Root‐Like Carbon Fibers Embedded with Ni–Co Nanoparticles for Dendrite‐Free Lithium Metal Anodes

et al. 2021

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The growth of lithium (Li) dendrites and the huge volume change are the critical issues for the practical applications of Li‐metal anodes. In this work, a spatial control strategy is proposed to address the above challenges using lotus‐root‐like Ni–Co hollow prisms@carbon fibers (NCH@CFs) as the host. The homogeneously distributed bimetallic Ni–Co particles on the N‐doped carbon fibers serve as nucleation sites to effectively reduce the overpotential for Li nucleation. Furthermore, the 3D conductive network can alter the electric field. More importantly, the hierarchical lotus‐root‐like hollow fibers provide sufficient void space to withstand the volume expansion during Li deposition. These structural features guide the uniform Li nucleation and non‐dendritic growth. As a result, the NCH@CFs host enables a very stable Li metal anode with a low voltage hysteresis during repeated Li plating/stripping for 1200 h at a current density of 1 mA cm−2.

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Section: Introductionmentioning

confidence: 99%

Lotus‐Root‐Like Carbon Fibers Embedded with Ni–Co Nanoparticles for Dendrite‐Free Lithium Metal Anodes

et al. 2021

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“…The charge density differences also manifest that electron interactions between Li 2 S and Fe 3 C-containing structures (G-Fe 3 C-Li 2 S in Figure 4 c and G-N-Fe 3 C-Li 2 S in Figure 4 d) are much stronger than that for Fe 3 C-free cases. [24][25][26][27] In Figure 4 In summary, molten salt electrolysis of iron oxide coated with polydopamine has been demonstrated as a sophisticated modulation of iron-carbon-nitrogen. The resulting Fe 3 C@C@Fe 3 C integrates hollow structure, nitrogen doping into carbon and incorporation of Fe 3 C nanoparticles to achieve an excellent sulfur host.…”

Section: Methodsmentioning

confidence: 94%

Molten Salt Electrochemical Modulation of Iron–Carbon–Nitrogen for Lithium–Sulfur Batteries

et al. 2021

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Sulfur hosts with rationally designed chemistry to confine and convert lithium polysulfides are of prime importance for high-performance lithium-sulfur batteries. A molten salt electrochemical modulation of iron-carbon-nitrogen is herein demonstrated as formation of hollow nitrogen-doped carbon with grafted Fe 3 C nanoparticles (Fe 3 C@C@Fe 3 C), which is rationalized as an excellent sulfur host for lithiumsulfur batteries. Fe 3 C over nitrogen-doped carbon contributes to enhanced adsorption and catalytic conversion of lithium polysulfides. The sulfur-loaded Fe 3 C@C@Fe 3 C electrodes hence show a high capacity, good cyclic stability, and enhanced rate performance. This work highlights the unique chemistry of metal carbides on facilitating adsorption-conversion process of lithium polysulfides, and also extends the scope of molten salt electrolysis to elaboration of energy materials. Electrochemicalenergystorageisakey-enablingprotocoltoachieve a carbon-neutral world. Lithium-sulfur (Li-S) batteries hold great promise to upgrade lithium-ion batteries (LIBs) because of high energy density, low cost and environmental benignity. [1,2] Setbacks in large-scale application of Li-S batteries include intrinsically low conductivity of sulfur and lithium sulfide (Li 2 S), shuttling effects caused by dissolution of lithium polysulfides (LiPSs), and tardy conversion kinetics of LiPSs. [3][4][5][6] The aforenamed challenges can effectively be ameliorated by constructing sulfur hosts with hollow structures and specific compositions. [7,8] Hollow structure could physically lock LiPSs within confined spaces and hence restrain shuttling between electrodes. [9] Sulfur/nanostructured carbon composites could greatly improve conductivity and cycling ability. [8] Other sulfur hosts were introduced to improve the adsorption of LiPSs, including metals, [10] metal carbides, [10,11] oxides, [12] nitrides, [13,14] sulfides and metal-free mediators. [15] Metal carbides are intriguing due to strong adsorption of LiPSs over the high-polarity surface and catalytic conversion of LiPSs. The synergy between adsorption and catalytic conversion of metal carbides thus suppresses the inconvenient

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“…The lithiophilicity of carbon-based hosts can also be enhanced by coating with lithiophilic materials, such as Lialloying materials (e.g., Ag, [129][130][131] Au, 82,132 Zn, [133][134][135] etc. ), metal oxides (e.g., ZnO, [136][137][138][139][140][141][142] Al 2 O 3 , 143 Co 3 O 4 , 144 etc.…”

Section: Regulating LI Nucleation Through Lithiophilic Engineering For An Anode-free Configurationmentioning

confidence: 99%

Carbon materials for stable Li metal anodes: Challenges, solutions, and outlook

Jie

Meng

et al. 2021

Carbon Energy

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Lithium (Li) metal is regarded as the ultimate anode for next-generation Li-ion batteries due to its highest specific capacity and lowest electrochemical potential. However, the Li metal anode has limitations, including virtually infinite volume change, nonuniform Li deposition, and an unstable electrode-electrolyte interface, which lead to rapid capacity degradation and poor cycling stability, significantly hindering its practical application. To address these issues, intensive efforts have been devoted toward accommodating and guiding Li deposition as well as stabilizing the interface using various carbon materials, which have demonstrated excellent effectiveness, benefiting from their vast variety and excellent tunability of the structure-property relationship. This review is intended as a guide through the fundamental Carbon Energy.

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Nitrogen‐Doped Amorphous Zn–Carbon Multichannel Fibers for Stable Lithium Metal Anodes

Cited by 139 publications

References 48 publications

Lotus‐Root‐Like Carbon Fibers Embedded with Ni–Co Nanoparticles for Dendrite‐Free Lithium Metal Anodes

Lotus‐Root‐Like Carbon Fibers Embedded with Ni–Co Nanoparticles for Dendrite‐Free Lithium Metal Anodes

Molten Salt Electrochemical Modulation of Iron–Carbon–Nitrogen for Lithium–Sulfur Batteries

Carbon materials for stable Li metal anodes: Challenges, solutions, and outlook

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