Advances in the Emerging Gradient Designs of Li Metal Hosts

Guan, Wanqing; Hu, Xiaoqi; Liu, Yuhang; Sun, Jianyu; He, Chen; Du, Zhuzhu; Bi, Jingxuan; Wang, Ke; Ai, Wei

doi:10.34133/2022/9846537

Cited by 17 publications

(10 citation statements)

References 119 publications

(151 reference statements)

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Section: Graphene Anodementioning

confidence: 98%

“…[104] It should be mentioned that no matter whether CNFs or CNTs are used, their intrinsic 1D structure can effectively prevent graphene from restacking, and more importantly, lead to the formation of interconnected networks for electrons and Li ions transportation within the composite. [105] Similarly, Hsieh et al [106] and Atar et al [107] synthesized silver and gold nanorods decorated graphene anodes, respectively, both of which are able to deliver higher Li storage capacity than the bare graphene electrode.…”

Section: Interlayer Engineeringmentioning

confidence: 99%

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On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

Sun

et al. 2023

Advanced Materials

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101

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Graphene with fascinating physicochemical properties has been regarded as one of the most promising candidates to substitute the commercial graphite anode for next-generation lithium-ion batteries (LIBs). [1] As originally suggested by Dahn's group, Li ions can be adsorbed on each side of graphene, forming a Li 2 C 6 stoichiometry with a theoretical specific capacity of 744 mAh g −1 , twice that of graphite (372 mAh g −1 of the first-stage LiC 6 intercalation compound). [2] However, in situ Raman spectroscopy reveals that it is difficult to achieve high Li coverage on graphene because of the low binding energy of Li with carbon and the strong Coulombic repulsion between the adsorbed Li ions. [3] Using density functional theory (DFT) calculations, Lee et al. also found that Li cannot reside on the surface of pristine graphene since its adsorption energy is positive for the entire range of Li content. [4] Therefore, the Li storage capacity of pristine graphene is far from its theoretical value, and is even inferior to that of graphite. Accordingly, it was proposed that defective graphene presents superior Li adsorption because of the increased charge transfer between Li and the defects, and moreover, the specific capacity rises with the increase of defects densities. [5] In the case of the maximum divacancy defect density, the Li storage capacity can reach up to 1675 mAh g −1 . In this regard, reduced graphene oxide (rGO), a form of graphene prepared by a chemical oxidation-exfoliation-reduction process, has been proven to be a potential anode by virtue of its abundant defects and the residual O-containing functional groups. [6] On the other hand, rGO also exhibits the advantages of mass production from the reduction of graphene oxide (GO) with contained costs, which is an essential step for practical applications. [7] As a result, rGO anode is more frequently studied as compared to its pristine graphene counterpart.The groundbreaking work of graphene anodes was reported in 2008 by Honma's group, who demonstrated that the incorporation of carbonaceous materials, i.e., carbon nanotubes (CNTs) and fullerenes (C 60 ), into graphene sheets can efficiently expand the interlayer spacing, thus higher Li storage capacities. [8] Soon Graphene has long been recognized as a potential anode for next-generation lithium-ion batteries (LIBs). The past decade has witnessed the rapid advancement of graphene anodes, and considerable breakthroughs are achieved so far. In this review, the aim is to provide a research roadmap of graphene anodes toward practical LIBs. The Li storage mechanism of graphene is started with and then the approaches to improve its electrochemical performance are comprehensively summarized. First, morphologically engineered graphene anodes with porous, spheric, ribboned, defective and holey structures display improved capacity and rate performance owing to their highly accessible surface area, interconnected diffusion channels, and sufficient active sites. Surface-modified graphene anodes with less aggreg...

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Section: Graphene Anodementioning

confidence: 98%

Section: Interlayer Engineeringmentioning

confidence: 99%

On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

Sun

et al. 2023

Advanced Materials

Self Cite

101

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“…Distinct from bare 3D scaffolds, the introduction of gradient structures including lithiophilicity, conductivity, porosity and their hybrids benefits bottom-up Li deposition, thus substantially improving the safety of LMBs [190,191]. Zhang et al prepared a CNF-based skeleton with a lithiophilic gradient on Cu foil, where the upper layer is sputtered Si particles and the lower layer is deposited ZnO particles.…”

Section: Metal-cu Scaffoldsmentioning

confidence: 99%

Present and future of functionalized Cu current collectors for stabilizing lithium metal anodes

Liu¹,

Li²,

Sun³

et al. 2023

Nano Research Energy

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Li metal has been recognized as the most promising anode materials for next-generation high-energy-density batteries, however, the inherent issues of dendrite growth and huge volume fluctuations upon Li plating/stripping normally result in fast capacity fading and safety concerns. Functionalized Cu current collectors have so far exhibited significant regulatory effects on stabilizing Li metal anodes (LMAs), and hold a great practical potential owing to their easy fabrication, low-cost and good compatibility with the existing battery technology. In this review, a comprehensive overview of Cu-based current collectors, including planar modified Cu foil, 3D architectured Cu foil and nanostructured 3D Cu substrates, for Li metal batteries is provided. Particularly, the design principles and strategies of functionalized Cu current collectors associated with their functionalities in optimizing Li plating/stripping behaviors are discussed. Finally, the critical issues where there is incomplete understanding and the future research directions of Cu current collectors in practical LMAs are also prospected. This review may shed light on the critical understanding of current collector engineering for high-energy-density Li metal batteries.

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“…45,46 In conclusion, combining the two aspects of electronic conductivity and lithiophilicity, the design of Li metal anode hosts will become an effective method to achieve uniform Li metal plating/stripping in electrochemical processes. 47 In this Review, the challenges of LMBs are reviewed and the optimization strategies of Li metal anode hosts are proposed in terms of electronic conductivity and lithiophilicity. The design strategies of the host structure are then presented based on the two crucial components.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Therefore, how to design Li metal anode hosts from the perspective of electronic conductivity is a critical problem . In addition to electronic conductivity, lithiophilicity has become another crucial factor influencing Li metal deposition, which can result in uniform Li metal deposition. , In conclusion, combining the two aspects of electronic conductivity and lithiophilicity, the design of Li metal anode hosts will become an effective method to achieve uniform Li metal plating/stripping in electrochemical processes …”

Section: Introductionmentioning

confidence: 99%

Gradient Host for Bottom-Up Deposition of Lithium Metal Anode

Shen,

Liu,

Tang

et al. 2023

Ind. Eng. Chem. Res.

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Lithium metal batteries have been attracting an abundance of attention recently as a powerful competitor of the next-generation advanced energy storage technologies. However, lithium dendrite formation can result in decreased battery lifespan and even safety issues, inhibiting the widespread application of lithium metal batteries. The conductive hosts of lithium metal anode are proven to be an effective method to prevent lithium dendrite formation and achieve outstanding electrochemical performance of lithium metal batteries. However, the surface deposition of Li ions decreases the utilization of the conductive host. Therefore, this Review introduces the design principle and recent advances to render the bottom-up deposition of a lithium metal anode. On one hand, conductivity and lithiophilicity gradient hosts are summarized to realize the “bottom-up” lithium deposition and efficiently limit the growth of lithium dendrites. On the other hand, the future prospects and challenges of host design associated with the “bottom-up” lithium deposition technique are discussed. This Review intends to provide novel insights for the development of gradient materials design and lithium metal batteries with long lifespan and high safety.

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Advances in the Emerging Gradient Designs of Li Metal Hosts

Cited by 17 publications

References 119 publications

On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

Present and future of functionalized Cu current collectors for stabilizing lithium metal anodes

Gradient Host for Bottom-Up Deposition of Lithium Metal Anode

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