Mg Doped Li–LiB Alloy with In Situ Formed Lithiophilic LiB Skeleton for Lithium Metal Batteries

Wu, Chen; Huang, Haifeng; Lu, Weiyi; Wei, Zengxi; Ni, Xuyan; Sun, Fu; Qing, Piao; Liu, Zhijian; Ma, Jianmin; Wei, Weifeng; Chen, Libao; Yan, Chenglin; Mai, Liqiang

doi:10.1002/advs.201902643

Cited by 130 publications

(89 citation statements)

References 55 publications

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“…Third, a porous interconnected structure of Li–B alloy can accommodate the volume changes during the stripping/plating process of metallic Li and improve the mechanical stability of the electrode. [ 14,15 ] Fourth, high conductivity of Li–B alloy (1.43 × 10 3 S cm −1 ) framework provides pathway for charge transport. [ 13 ] The lithiophilic property of Li–B alloy enhances the interaction between the framework and metallic Li even at high temperature.…”

Section: Figurementioning

confidence: 99%

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A Lithium Metal Anode Surviving Battery Cycling Above 200 °C

Wan

Bao

et al. 2020

Advanced Materials

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Lithium (Li) metal electrode cannot endure elevated temperature (e.g., >200 °C) with the regular battery configuration due to its low melting point (180.5 °C) and high reactivity, which restricts its application in high‐temperature Li metal batteries for energy storage and causes safety concerns for regular ambient‐temperature Li metal batteries. Herein, this work reports a Li5B4/Li composite featuring a 3D Li5B4 fibrillar framework filled with metallic Li, which maintains its initial structure at 325 °C in Ar atmosphere without leakage of the liquid Li. The capillary force caused by the porous structure of the Li4B5 fibrillar framework, together with its lithiophilic surface, restricts the leakage of liquid metallic Li and enables good thermal tolerance of the Li5B4/Li composite. Thus, it can be facilely operated for rechargeable high‐temperature Li metal batteries. Li5B4/Li electrodes are coupled with a garnet‐type ceramic electrolyte (Li6.5La3Zr0.5Ta1.5O12) to fabricate symmetric cells, which exhibit stable Li stripping/plating behaviors with low overpotential of ≈6 mV at 200 °C using a regular sandwich‐type cell configuration. This work affords new insights into realizing a stable Li metal anode for high‐temperature Li metal batteries with a simple battery configuration and high safety, which is different from traditional molten‐salt Li metal batteries using a pristine metallic Li anode.

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Section: Figurementioning

confidence: 99%

“…[ 13 ] The lithiophilic property of Li–B alloy enhances the interaction between the framework and metallic Li even at high temperature. [ 14 ] Therefore, stable battery cycling for the Li–B alloy/Li electrode can be expected at high temperature above the melting temperature of metallic Li.…”

Section: Figurementioning

confidence: 99%

A Lithium Metal Anode Surviving Battery Cycling Above 200 °C

Wan

Bao

et al. 2020

Advanced Materials

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“…Furthermore, the high surface area provided by 3D structures can further lower the localized current density and enable a more stable plating/stripping process [26]. Even confining the lithium metal in 3D carbon materials is a more common strategy, there are still some pioneering works on using the 3D lithium alloys matrix to host the lithium metal [26,37,102].…”

Section: Lithium Alloys Matrix Equationsmentioning

confidence: 99%

“…By employing this Li@Li 7 B6 anode, the Li-S batteries could stability cycle to 2000 cycles. Recently, Yan and his co-workers reported a 3D Mg doped LiB skeleton for hosting the metallic lithium and inhibiting the lithium dendrite growth as shown in Figure 4a and 4b [102]. The 3D LiB skeleton could significantly reduce volume variation during Li electrochemical dissolution/deposition process.…”

Section: Lithium Alloys Matrix Equationsmentioning

confidence: 99%

Li-containing alloys beneficial for stabilizing lithium anode: a review

Dong

Lai

2020

Preprint

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Due to the soaring growth of the electric vehicles and grid energy storage markets, the high-safety and high-energy-density battery storage systems are urgent needed. Lithium metal anode with highest theoretical specific capacity (3860 mA•h•g-1) and the lowest electrochemical potential (-3.04 V vs standard hydrogen electrode) is regarded as the ultimate choice for the high energy density batteries. However, its safety problems as well as the low Coulombic efficiency during the Li plating and stripping processes significantly limit the commercialization of lithium metal batteries. Recently, Li-containing alloys have demonstrated vital roles in inhibiting lithium dendrite growth, controlling interfacial reactions and enhancing the Coulombic efficiency as well as cycle life. Accordingly, in this perspective, the progresses of lithium alloys for robust, stable and dendrite free anode for rechargeable lithium metal batteries are summarized. The challenges and future focus research of lithium-containing alloys in lithium metal batteries are also discussed.

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“…Lithium-boron (Li-B) alloys play an important role in the fields of the thermal batteries and Li metal batteries, and this is attributed to several factors including high specific capacity, high specific power, the in-situ formed three-dimensional LiB skeleton, and similar electrochemical potential to Li (Guidotti and Masset, 2008;Duan et al, 2013;Cheng et al, 2014;Zhang et al, 2014;Liu et al, 2018;Zhong et al, 2018;Wu et al, 2020). The electrochemical performance of Li-B alloys is highly dependent on the homogeneity of the microstructure, the Li content, and the presence of defects (such as holes, cracks, impurities).…”

Section: Introductionmentioning

confidence: 99%

Non-destructive CT Method for Spatially Resolved Measurement of Elemental Content and Density of Li-B Alloys

Huang

Liu

et al. 2020

Front. Chem.

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Lithium-boron (Li-B) alloys play an important role in the fields of thermal batteries and Li metal batteries, where the electrochemical performance is highly dependent on microstructure homogeneity and the Li content. In this study, computed tomography (CT) scanning has been firstly used to study the elemental content and spatial distribution of Li in a Li-B alloy. For a commercial Li-B alloy, quantitative relationships between the CT values, [Hu], and the weight percent of Li, w T−Li , and the density, ρ Li−B , that is, [Hu] = 13563.8 36.2×w T−Li −2.8 − 1, 016.2 and [Hu] = 790.1 × ρ Li−B − 1, 016.2, respectively. The experimental data were found to be in good agreement with current theory. The CT scanning method was non-destructive, and proved to be fast, highly accurate, and low-cost for the characterization of Li-B alloy ingots in terms of elemental composition, density, and uniformity.

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Mg Doped Li–LiB Alloy with In Situ Formed Lithiophilic LiB Skeleton for Lithium Metal Batteries

Cited by 130 publications

References 55 publications

A Lithium Metal Anode Surviving Battery Cycling Above 200 °C

A Lithium Metal Anode Surviving Battery Cycling Above 200 °C

Li-containing alloys beneficial for stabilizing lithium anode: a review

Non-destructive CT Method for Spatially Resolved Measurement of Elemental Content and Density of Li-B Alloys

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