Low‐Bandgap Se‐Deficient Antimony Selenide as a Multifunctional Polysulfide Barrier toward High‐Performance Lithium–Sulfur Batteries

Tian, Yuan; Li, Gaoran; Zhang, Yongguang; Luo, Dan; Wang, Xin; Zhao, Yan; Liu, Hui; Ji, Puguang; Du, Xiaohang; Li, Jingde

doi:10.1002/adma.201904876

Cited by 217 publications

(140 citation statements)

References 55 publications

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“…[1][2][3] Among the various candidates, lithiumsulfur (Li-S) batteries have attracted particular research attentions due to the high theoretical specific capacity (1675 mAh g −1 ), low cost, and environmental friendliness of sulfur. [4][5][6] However, the state-of-the-art Li-S batteries are still struggling to fulfill the expected energy density and serving life for practical application due to some intractable challenges. For example, both sulfur and its lithiation products are electrically and ionically insulating, which renders the intrinsically sluggish redox reaction kinetics.…”

Section: Introductionmentioning

confidence: 99%

Engineering the Conductive Network of Metal Oxide‐Based Sulfur Cathode toward Efficient and Longevous Lithium–Sulfur Batteries

Wang

Luo

et al. 2020

Advanced Energy Materials

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135

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The rational design of sulfur cathode structure to suppress shuttling behaviors and expedite the conversion kinetics of polysulfides plays an essential role for the practical implementation of lithium–sulfur (Li–S) batteries. In this work, a unique consecutive and oxygen‐deficient niobium oxide (Nb2O5−x) framework featured with 3D ordered macroporous (3DOM) architecture and carbon nanotubes (CNTs) embedding is developed, which serves as a high‐performance sulfur immobilizer and catalytic promoter for polysulfide conversion. The 3DOM architecture affords a robust porous and open framework that favors electrolyte infiltration for fast ion/mass transfer, as well as interface exposure for massive host–guest interactions. More importantly, CNTs are designed as “antennae” embedded within the Nb2O5−x skeleton, which not only contributes to a highly conductive framework but also intensifies the oxygen deficiency with enhanced sulfur immobilization and reaction catalyzation. Benefiting from these advanced features, Li–S cells based on S‐Nb2O5−x/CNTs cathode achieve excellent cyclability with a high capacity retention of 847 mAh g−1 after 500 cycles and remarkable rate capability with 741 mAh g−1 at 5 C. Moreover, a high areal capacity of 6.07 mAh cm−2 can also be achieved under a high sulfur loading of 6 mg cm−2, illustrating great potential in the development of practical Li–S batteries.

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Section: Introductionmentioning

confidence: 99%

Engineering the Conductive Network of Metal Oxide‐Based Sulfur Cathode toward Efficient and Longevous Lithium–Sulfur Batteries

Wang

Luo

et al. 2020

Advanced Energy Materials

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135

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“…Except for the O and S vacancies, Chen et al have introduced abundant Se vacancies into antimony selenide (Sb 2 Se 3-x ), as shown in Figure 3e, which can promote the conductivity, strengthen the chemical affinity to LiPSs, and motivate the fast catalytic conversion of LiPSs. [76] When the Sb 2 Se 3-x /r-GO is used as a separator in LiÀ S battery, the cell exhibits a high reversible capacity of 847 mAh g À 1 after 500 cycles at 1.0 C and a minimum capacity fading rate of 0.027% per cycle (Figure 3f), which are attributed to the highly conductive nature, rapid ion/mass transfer, and good LiPS affinity of the as-prepared Sb 2 Se 3-x /rGO. Heteroatoms doping.…”

Section: Sulfur Cathodementioning

confidence: 99%

“…(e) Schematic illustration of the LiPSs transformation on the surface of Sb 2 Se 3-x . (f) The cycling performance of cells with Sb 2 Se 3-x /rGO-, Sb 2 Se 3 /rGO-and rGO-modified and routine separators at 1.0 C. Reproduced with permission from Ref., [76] Copyright 2019, Wiley-VCH. naturally act as Lewis base sites to interact with terminal Li atoms in LiPSs via dipole-dipole electrostatic interaction, thereby immobilizing LiPSs and preventing their dissolution and shuttle in electrolyte.…”

Section: Sulfur Cathodementioning

confidence: 99%

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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“…The low working voltage of LSB (~2.2 V) can adapt to the commercial need. In addition, sulfur also has the advantage of being a sufficient resource, having low cost, and being harmless to the environment [6][7][8][9][10][11]. Therefore, LSB is regarded as the most potential substitute for commercial LIB, but the performance of LSB is still difficult to reach the current level of commercial LIB, for these reasons: (1) the low conductivity of elemental sulfur and its discharge products (Li 2 S 2 and Li 2 S).…”

Section: Introductionmentioning

confidence: 99%

3D Hollow rGO Microsphere Decorated with ZnO Nanoparticles as Efficient Sulfur Host for High-Performance Li-S Battery

Zhang

et al. 2020

Nanomaterials

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Lithium-sulfur battery (LSB) will become the next generation energy storage device if its severe shuttle effect and sluggish redox kinetics can be effectively addressed. Here, a unique three-dimensional hollow reduced graphene oxide microsphere decorated with ZnO nanoparticles (3D-ZnO/rGO) is synthesized to decrease the dissolution of lithium polysulfide (LiPS) into the electrolyte. The chemical adsorption of ZnO on LiPS is combined with the physical adsorption of 3D-rGO microsphere to synergistically suppress the shuttle effect. The obtained 3D-ZnO/rGO can provide sufficient space for sulfur storage, and effectively alleviate the repeated volume changes of sulfur during the cycle. When the prepared S-3D-ZnO/rGO was used as the cathode in LSB, an initial discharge specific capacity of 1277 mAh g−1 was achieved at 0.1 C. After 100 cycles, 949 mAh g−1 can still be maintained. Even at 1 C, a reversible discharge specific capacity of 726 mAh g−1 was delivered.

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Low‐Bandgap Se‐Deficient Antimony Selenide as a Multifunctional Polysulfide Barrier toward High‐Performance Lithium–Sulfur Batteries

Cited by 217 publications

References 55 publications

Engineering the Conductive Network of Metal Oxide‐Based Sulfur Cathode toward Efficient and Longevous Lithium–Sulfur Batteries

Engineering the Conductive Network of Metal Oxide‐Based Sulfur Cathode toward Efficient and Longevous Lithium–Sulfur Batteries

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

3D Hollow rGO Microsphere Decorated with ZnO Nanoparticles as Efficient Sulfur Host for High-Performance Li-S Battery

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