Reviving Inactive Lithium and Stabilizing Lithium Deposition for Improving the Performance of Anode-Free Lithium–Sulfur Batteries

Weret, Misganaw Adigo; Jiang, Shi‐Kai; Shitaw, Kassie Nigus; Chang, Chia‐Yu; Tekaligne, Teshager Mekonnen; Chiou, Jeng-Chian; Yang, Sheng‐Chiang; Temesgen, Nigusu Tiruneh; Nikodimos, Yosef; Wu, She‐Huang; Wang, Chun‐Chieh; Su, Wei‐Nien; Hwang, Bing‐Joe

doi:10.1021/acsenergylett.3c00622

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…The first is that the LiPSs of the cathode electrode diffuse to the anode electrode side and deposit on the lithium surface; the second is the participation of lithium salt in the formation of solid electrolyte interlayer (SEI). Recent studies have shown that a small amount of LiPSs and LiNO 3 as electrolyte additives can effectively suppress the dendrite problem of lithium metal anodes . After using the CoP@NPC-S electrode, the metal lithium anode remains flat and smooth after 100 cycles, indicating that a small amount of LiPSs shuttle to the anode side does have a positive effect on stabilizing the lithium anode.…”

Section: Resultsmentioning

confidence: 99%

Highly Catalytic CoP@N, P-Codoped Porous Carbon Synthesized by a Supramolecular Gel and Salt Template Method for Li–S Batteries

Shi,

Xu,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Lithium polysulfides (LiPSs) shuttling effect is the main problem to be solved for cathode materials of lithium–sulfur batteries. The adsorption and catalytic conversion of LiPSs by host materials have become the main focus of cathode materials. In this work, transition metal phosphides are combined with three-dimensional carbon nanosheets to form an efficient and stable sulfur host material. The designed composite material is effective in solving the problems of slow reaction kinetics of Li–S batteries and LiPSs shuttling. Here, through the supramolecular self-assembly process of melamine and phytic acid, combined with soluble salt template technology, N- and P-codoped three-dimensional hierarchical porous carbon materials with uniformly dispersed CoP nanoparticles were efficiently synthesized. The catalytic effect of CoP nanoparticles improves the reaction kinetics effectively of LiPS conversion. The strong polarity of CoP nanoparticles is beneficial to the adsorption of polysulfide ions. Moreover, the high specific area provides more LiPS adsorption sites, and the doping of N and P heteroatoms further increases the active sites of the composites. The experimental results and theoretical calculations show that the introduction of CoP promotes the conversion of LiPSs and accelerates the nucleation rate of Li2S, thereby improving the electrochemical performance of the composite as a sulfur host for lithium–sulfur batteries.

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Section: Resultsmentioning

confidence: 99%

Highly Catalytic CoP@N, P-Codoped Porous Carbon Synthesized by a Supramolecular Gel and Salt Template Method for Li–S Batteries

Shi,

Xu,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Optimizing Current Collector Interfaces for Efficient “Anode‐Free” Lithium Metal Batteries

Molaiyan,

Abdollahifar,

Boz

et al. 2023

Adv Funct Materials

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Current lithium (Li)‐metal anodes are not sustainable for the mass production of future energy storage devices because they are inherently unsafe, expensive, and environmentally unfriendly. The anode‐free concept, in which a current collector (CC) is directly used as the host to plate Li‐metal, by using only the Li content coming from the positive electrode, could unlock the development of highly energy‐dense and low‐cost rechargeable batteries. Unfortunately, dead Li‐metal forms during cycling, leading to a progressive and fast capacity loss. Therefore, the optimization of the CC/electrolyte interface and modifications of CC designs are key to producing highly efficient anode‐free batteries with liquid and solid‐state electrolytes. Lithiophilicity and electronic conductivity must be tuned to optimize the plating process of Li‐metal. This review summarizes the recent progress and key findings in the CC design (e.g. 3D structures) and its interaction with electrolytes.

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Coordination Defect‐Induced Lewis Pairs in Metal−Organic Frameworks Boosted Sulfur Kinetics for Bifunctional Photo‐Assisted Li−S Batteries

Wu,

Wang,

Song

et al. 2024

Adv Funct Materials

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The photo‐assisted strategy is regarded as a crucial approach to enhance the conversion kinetics of polysulfides in lithium–sulfur (Li–S) batteries. However, the development of photo‐assisted Li–S batteries still faces important challenges, such as the rapid recombination of photogenerated electron−holes on cathode and more severe shuttle effect. Herein, a breakthrough in overcoming the challenges has been made by constructing a promising photo‐assisted Li−S battery based on semiconducted metal−organic frameworks. During the discharging progress, the photoexcited electrons generated by H2BPDC ligand based on ligand‐to‐metal charge transfer (LMCT) effect, are injected into the Ti‐oxo clusters in Ti‐MOF, thereby facilitating the sulfur reduction to Li2S. And photoexcited holes are capable of promoting the decomposition kinetics of Li2S during charging. More importantly, the stronger chemical interaction between Ti‐BPDC‐d and polysulfides under light inhibits the polysulfides dissolution and shuttling, which fundamentally addresses the issue of light‐accelerated shuttling. As a result, the photo‐assisted Li–S batteries deliver a reversible capability of 1090.21 mAh g−1 at 0.2 C with a capacity retention of 82.91% over 150 cycles, and a superior rate capability of 673.58 mAh g−1 at 5 C. The findings are promising in advancing the design principles for photo‐rechargeable Li−S batteries.

show abstract

Reviving Inactive Lithium and Stabilizing Lithium Deposition for Improving the Performance of Anode-Free Lithium–Sulfur Batteries

Cited by 6 publications

References 27 publications

Highly Catalytic CoP@N, P-Codoped Porous Carbon Synthesized by a Supramolecular Gel and Salt Template Method for Li–S Batteries

Highly Catalytic CoP@N, P-Codoped Porous Carbon Synthesized by a Supramolecular Gel and Salt Template Method for Li–S Batteries

Optimizing Current Collector Interfaces for Efficient “Anode‐Free” Lithium Metal Batteries

Coordination Defect‐Induced Lewis Pairs in Metal−Organic Frameworks Boosted Sulfur Kinetics for Bifunctional Photo‐Assisted Li−S Batteries

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