The combination of intercalation and conversion reactions to improve the volumetric capacity of the cathode in Li–S batteries

Zhou, Ling; Yao, Lin; Li, Shixiong; Zai, Jiantao; Li, Shutang; He, Qingquan; He, Kai; Li, Xiaomin; Wang, Donghai; Qian, Xuefeng

doi:10.1039/c8ta11375k

Cited by 25 publications

(20 citation statements)

References 63 publications

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“…of V=S, V—S bonds, [ 36 ] respectively. Above all, both the V2p and S2p patterns indicate that the formation of chemical bonds between VO 2 (M) and S 8 .…”

Section: Resultsmentioning

confidence: 99%

“…[ 42 ] Also, the oxidation peaks (iii and iv) at roughly 2.36 and 2.41 V are attributed to the converse conversion reactions of the final discharge products (lithium sulfides) to soluble polysulfides and further to the original active sulfur, respectively. [ 29,36 ] Interestingly, Li‐VO 2 (M)@CFs/S cathode with a slight shift to higher potential during the discharge process compared to the VO 2 (M)@CFs/S cathode shows its faster redox reactions. The much sharper peak ii of Li‐VO 2 (M)@CFs/S cathode suggests the enhanced conversion from LiPSs to insoluble Li 2 S, anticipating that the structure will upgrade the electrochemical performance of Li‐S batteries.…”

Section: Resultsmentioning

confidence: 99%

“…The existence of these chemical bonds are beneficial to the entrapment of LiPSs and the improvement of cycling stability. [ 36 ]…”

Section: Background and Originality Contentmentioning

confidence: 99%

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Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†

Wang

Zhang

et al. 2020

Chin. J. Chem.

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of main observation and conclusion We successfully prepared the Li-VO2(M) nanosheets via a facile lithiation method. After compositing with conductive carbon fibers, the sulfur host (Li-VO2(M)@CFs) combines the efficient adsorption ability of the VO2(M) with superior electronic conductivity of the carbon fibers. Besides, carbon fiber cloth used as the current collector can provide the 3D electronic channels. Therefore, the coin cells exhibited the superior reversible capacity of 1250 mA h g-1 at 0.2 C and a low capacity decay value of 0.068% per cycle within 416 cycles at 1 C, indicative of the favorable cycling stability. Moreover, even at a high rate of 5 C, it also kept at a high discharge capacity of 401 mA h g-1. In conclusion, this work discloses an attractive route to reduce the dissolution loss of lithium polysulfides (LiPSs) and enhance the overall performance of Li-S batteries.

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“…of V=S, V—S bonds, [ 36 ] respectively. Above all, both the V2p and S2p patterns indicate that the formation of chemical bonds between VO 2 (M) and S 8 .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†

Wang

Zhang

et al. 2020

Chin. J. Chem.

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“…However, Xu et al have demonstrated O vacancies on ultrathin niobic acid could hinder the LiPSs redox conversion kinetics. [74] In the study, the decreased performance of LiÀ S batteries was mainly due to the decreased electrical conductivity and the weakened adsorption of LiPSs by the high O vacancy concentration.…”

Section: Sulfur Cathodementioning

confidence: 91%

Function and Application of Defect Chemistry in High‐Capacity Electrode Materials for Li‐Based Batteries

Qiao

Lin

Yan

et al. 2020

Chemistry An Asian Journal

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Current commercial Li-based batteries are approaching their energy density limitation, yet still cannot satisfy the energy density demand of the high-end devices. Hence, it is critical to developing advanced electrode materials with high specific capacity. However, these electrode materials are facing challenges of severe structural degradation and fast capacity fading. Among various strategies, constructing defects in electrode materials holds great promise in addressing these issues. Herein, we summarize a series of significant defect engineering in the high-capacity electrode materials for Li-based batteries. The detailed retrospective on defects specification, function mechanism, and corresponding application achievements on these electrodes are discussed from the view of point, line, planar, volume defects. Defect engineering can not only stabilize the structure and enhance electric/ionic conductivity, but also act as active sites to improve the ionic storage and bonding ability of electrode materials to Li metal. We hope this review can spark more perspectives on evaluating high-energydensity Li-based batteries.

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“…Besides the metal oxides mentioned above, many other metal oxides such as SiO 2 , [101] Co 3 O 4 , [102] MgO, [103] Fe 2 O 3 , [104] Al 2 O 3 , [103a,105] V 2 O 5 , [106] Ta 2 O 5−x , [107] V 2 O 3 , [108] VO 2 , [109] ZnO, [110] WO 3 , [111] CaO, [103a] MoO 2 , [112] MoO 3 , [113] La 2 O 3 , [103a] SnO 2 , [114] Nb 2 O 5 , [115] ZnCo 2 O 4 , [116] NiFe 2 O 4 , [117] Nb 18 W 16 O 93 , [118] La 0.8 Sr 0.2 MnO 3 , [119] perovskite Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ , [120] and Figure 13. a) Schematic of synthetic process for TiO@C-HS/S spheres.…”

Section: The S Tmentioning

confidence: 99%

Advances in Lithium–Sulfur Batteries: From Academic Research to Commercial Viability

et al. 2021

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to sustain a continuous power supply for our daily life. [2] This is where rechargeable batteries can play a vital role in electrochemically storing and releasing the energy reversibly. [3] Additionally, as the majority of fossil fuel consumption is used for transportation, a shift from combustion engines to electric vehicles is essential in the 21st century. However, lithium-ion batteries, which have dominated the portable electronics over the past three decades, are unable to satisfy the high-energy requirement for electrical vehicles and next-generation energy storage. [2a,4] This is because the conventional lithium-ion batteries rely on the intercalation-type electrode materials and the lithium ions can only be intercalated topologically into certain specific sites, which limits their charge-storage capacity and energy density. [5] Therefore, exploring new battery chemistries beyond the horizon of current lithium-ion batteries is crucial for a sustainable future. [6] To realize a high energy density with new battery chemistries, seeking new types of electrode materials is a prerequisite. [7] Lithium metal, which has the highest theoretical specific capacity of 3860 mA h g −1 among the anode materials and the lowest electrochemical potential of −3.04 V versus the standard hydrogen electrode, is regarded as the "Holy Grail" anode material for next-generation batteries. [8] Sulfur, which is abundant, cheap, and environmentally benign, can offer a high theoretical specific capacity of 1675 mA h g −1 when paired with lithium metal, which is among the highest in solid cathode materials. [9] This is because the sulfur cathode undergoes a conversion reaction mechanism rather than the intercalation chemistry. Together with an average cell voltage of 2.15 V, the coupled lithium-sulfur (Li-S) battery can attain a high theoretical energy density of 2500 W h kg −1 , which is much higher than that of current lithium-ion batteries. [10] The earliest Li-S battery can be traced back to 1962 when Herbert and Ulam first introduced the concept of sulfur cathode (Figure 1). [11] Despite decades of research, the Li-S batteries had been long plagued with low discharge capacity and fast capacity decay upon cycling. Additionally, with the commercialization of lithium-ion batteries by Sony Co. in the 1990s, which have much more stable cycling performance and better safety, the research into Li-S batteries had once ceased for a period. [43] After 2000, as the rapid development of emerging applications such as electric vehicles and grid energy storage placed higher demands on the specific energy Lithium-ion batteries, which have revolutionized portable electronics over the past three decades, were eventually recognized with the 2019 Nobel Prize in chemistry. As the energy density of current lithium-ion batteries is approaching its limit, developing new battery technologies beyond lithiumion chemistry is significant for next-generation high energy storage. Lithiumsulfur (Li-S) batteries, which rely on the reversible redox reactions ...

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The combination of intercalation and conversion reactions to improve the volumetric capacity of the cathode in Li–S batteries

Abstract: Hollow VO2@S microspheres were designed as cathode materials with high volumetric capacity by combining the intercalation and conversion mechanisms together.

Cited by 25 publications

References 63 publications

Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†

Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†

Function and Application of Defect Chemistry in High‐Capacity Electrode Materials for Li‐Based Batteries

Advances in Lithium–Sulfur Batteries: From Academic Research to Commercial Viability

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The combination of intercalation and conversion reactions to improve the volumetric capacity of the cathode in Li–S batteries

Abstract: Hollow VO2@S microspheres were designed as cathode materials with high volumetric capacity by combining the intercalation and conversion mechanisms together.

Cited by 25 publications

References 63 publications

Lithiated VO2(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries†

Lithiated VO2(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries†

Function and Application of Defect Chemistry in High‐Capacity Electrode Materials for Li‐Based Batteries

Advances in Lithium–Sulfur Batteries: From Academic Research to Commercial Viability

Contact Info

Product

Resources

About

Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†

Lithiated VO₂(M)@Carbon Fibers Hybrid Host for Improving the Cycling Stability of Sulfur Cathode in Lithium‐Sulfur Batteries^†