Improved cycle stability and high security of Li-B alloy anode for lithium–sulfur battery

Zhang, Xiaolin; Wang, Weikun; Wang, Anbang; Huang, Yaqin; Yuan, Ke; Zhang, Yu; Qiu, Jingyi; Yang, Yusheng

doi:10.1039/c4ta01709a

Cited by 180 publications

(114 citation statements)

References 28 publications

(26 reference statements)

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“…[ 160,161 ] In comparison with the common metallic Li anode, the Li-B alloy exhibited better performance in preventing dendrite formation. [ 160 ] The Li metal showed serious dendrite growth on the surface after 20 cycles in a Li-S battery, while the Li-B alloy retained a smooth surface under the same test conditions, giving lower impedance than that of the Li metal based cell.…”

Section: Other Alloy-based Anodesmentioning

confidence: 98%

“…Importantly, the sponge-like framework of the Li-B alloy can be maintained during cycling, resulting in a good cycling stability. [ 161 ] Duan et al [ 160 ] studied the performance of the Li 7 B 6 alloy as an anode in Li-S batteries (see Figure 23 ). Compared with a pure Li metal anode, the Li 7 B 6 alloy anode exhibited slightly improved Li Coulombic effi ciency, and stabilized at about 96% after 25 cycles.…”

Section: Other Alloy-based Anodesmentioning

confidence: 98%

“…Recently, Zhang et al [ 161 ] studied the Li-B alloys with different B contents in Li-S batteries. They found that Li 7 B 6 alloy had the similar suppression on Li dendrite growth after 50 cycles in Li-S battery with 1 M LiTFSI/DOL-DME with 0.4 M LiNO 3 as Duan et al reported.…”

Section: Other Alloy-based Anodesmentioning

confidence: 99%

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Anodes for Rechargeable Lithium‐Sulfur Batteries

Cao

et al. 2015

Advanced Energy Materials

464

311

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this makes it one of the most promising candidates to meet the energy needs for powering future EVs. [ 6,[19][20][21][22][23][24][25][26] Research on Li-S batteries began in the early 1960s. [ 24,27 ] In the following fi ve decades, only limited progress was made based on sporadic research efforts in this fi eld. Recently, in the light of nanoporous carbon materials, the cell performance was greatly improved and the research passion on Li-S batteries has been revived. [ 20,28,29 ] Unlike Li-ion batteries that use Li + -ion insertion chemistry in intercalation inorganic compounds for both cathode and anode, Li-S batteries are based on a conversion reaction of S forming Li 2 S via polysulfi des as intermediate species (Li 2 S n , n = 4-8), which could deliver a high specifi c capacity of 1672 mAh g −1 . [ 20,24 ] However, to realize commercial Li-S batteries, there are still many technical challenges to be solved from cathode to anode, as well as electrolyte. [ 22,30,31 ] The performances of different components in Li-S batteries are often related to each other. For example, the improvements in S based cathode could benefi t from reduced degradation in metallic Li anode by minimizing polysulfi de migration and shuttle effect. In general, Li-S batteries suffer from low S utilization and short cycle life, which originate from poor conductivity of sulfur and its discharged product Li 2 S, self-discharge, large volume expansion (≈80%) upon the formation of Li 2 S, and the dissolution of polysulfi des in liquid electrolytes. [ 24,32,33 ] The insulating nature of S and the large volume expansion of S cathode upon discharge can be largely overcome via forming nanocomposite with highly porous carbon materials, which could greatly improve the S utilization and rate performance. [ 21,25,32,34 ] In addition, the porous cathode structure could hold the formed polysulfi des in the pores so as to reduce the degree of dissolution of polysulfi des into the electrolyte. Recently, it was also found that the synthesis of metastable small S molecules of S 2-4 confi ned in a conductive microporous carbon matrix could avoid the unfavorable formation of long chain polysulfi des, thus avoiding the S dissolution problem. [35][36][37] Although signifi cant improvements have been made in the cyclability of S/C composite cathodes, [ 21,24,28,38 ] there are still many problems involved in Li-S batteries before this technology can be adopted for practical applications. In contrast to the enormous research efforts on S cathode side, the Li metal anode in Li-S batteries, which is directly involved in the shuttle mechanism and the capacity failure, has attracted much less attention. [ 24,39 ] Recently, with the signifi cant improvements in the development of high capacity S cathodes using stable C/S composites, the research spotlight is falling on the anode side With the signifi cant progress that has been made toward the development of cathode materials and electrolytes in lithium-sulfur (Li-S) batteries in recent years, the stability of the anod...

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Section: Other Alloy-based Anodesmentioning

confidence: 98%

Section: Other Alloy-based Anodesmentioning

confidence: 98%

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Anodes for Rechargeable Lithium‐Sulfur Batteries

Cao

et al. 2015

Advanced Energy Materials

464

311

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“…In the plating process at a current density of 2 mA cm −2 for preparing the 3D lithium-Cu hybrid, metallic lithium was preferentially deposited onto the surface of Cu skeletons, and the morphology and thickness of the electrode were well maintained. [48] These 3D architectures exhibited a good electrochemical performance in term of high and stable lithium Adv. As a consequence, the 3D lithium-Cu electrode exhibited a high stable and low voltage hysteresis in symmetric cell and exhibited a high Columbic efficiency of 99% and long cycling lifespan in a full cell with LiFePO 4 as cathode.…”

Section: Regulating Electric Fields or Decreasing Effective Current Dmentioning

confidence: 99%

A Material Perspective of Rechargeable Metallic Lithium Anodes

Wang

Yang

2018

Advanced Energy Materials

111

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Rechargeable lithium‐based batteries are long considered as the most promising candidates for application in various electronic devices, electric vehicles, and even electrical grids owing to their ultrahigh energy densities. However, to date, metallic lithium‐based batteries are still far from practical applications due to the low Coulombic efficiency and fast capacity decay of lithium anodes. The poor electrochemical performances of metallic lithium anodes are inherently related to random growth of lithium dendrites and infinite volume charge of lithium anodes. In this review, the failure mechanisms of metallic lithium anodes are summarized and ascribed to the unstable and inhomogeneous solid electrolyte interphase, uneven distributions of electric field, and lithium‐ion flux during the lithium plating processes. Correspondingly, efficient strategies for mitigating these problems, including surficial engineering, electric field, and lithium‐ion flux regulation are discussed from the perspective of anode materials. Finally, an outlook is proposed for the design and fabrication of next‐generation rechargeable metallic lithium anodes that aims to address the intrinsic problems of metallic lithium anodes.

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“…Another promising anode instead of metallic lithium is lithium alloys like lithium–boron alloy (Li 7 B 6 ) . Zhang and co‐workers found that the 3D Li 7 B 6 nanostructure enlarged the specific area and then suppressed the dendrite growth by reducing the current density.…”

Section: Anodesmentioning

confidence: 99%

A Revolution in Electrodes: Recent Progress in Rechargeable Lithium–Sulfur Batteries

Fang

Peng

2014

Small

329

212

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As a promising candidate for future batteries, the lithium-sulfur battery is gaining increasing interest due to its high capacity and energy density. However, over the years, lithium-sulfur batteries have been plagued by fading capacities and the low Coulombic efficiency derived from its unique electrochemical behavior, which involves solid-liquid transition reactions. Moreover, lithium-sulfur batteries employ metallic lithium as the anode, which engenders safety vulnerability of the battery. The electrodes play a pivotal role in the performance of lithium-sulfur batteries. A leap forward in progress of lithium-sulfur batteries is always accompanied by a revolution in the electrode technology. In this review, recent progress in rechargeable lithium-sulfur batteries is summarized in accordance with the evolution of the electrodes, including the diversified cathode design and burgeoning metallic-lithium-free anodes. Although the way toward application has still many challenges associated, recent progress in lithium-sulfur battery technology still paints an encouraging picture of a revolution in rechargeable batteries.

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Improved cycle stability and high security of Li-B alloy anode for lithium–sulfur battery

Abstract: Li-B alloy has uniform Li deposition morphology and offers better capacity retention as advantageous anode properties over metallic lithium.

Cited by 180 publications

References 28 publications

Anodes for Rechargeable Lithium‐Sulfur Batteries

Anodes for Rechargeable Lithium‐Sulfur Batteries

A Material Perspective of Rechargeable Metallic Lithium Anodes

A Revolution in Electrodes: Recent Progress in Rechargeable Lithium–Sulfur Batteries

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