Ultrahigh-Volumetric-Energy-Density Lithium-Sulfur Batteries with Lean Electrolyte Enabled by Cobalt-Doped MoSe2/Ti3C2Tx MXene Bifunctional Catalyst
文献类型：期刊论文
| 作者 | Wang, Wei; Huai, Liyuan; Wu, Shangyou; Shan, Jiongwei; Zhu, Junlu; Liu, Zhonggang; Yue, Liguo; Li, Yunyong |
| 刊名 | ACS NANO
 |
| 出版日期 | 2021 |
| 卷号 | 15期号:7页码:11619-11633 |
| 关键词 | PERFORMANCE NANOSHEETS POLYSULFIDES CONVERSION LI2S |
| 英文摘要 | It is a significant challenge to design a dense high-sulfur-loaded cathode and meanwhile to acquire fast sulfur redox kinetics and suppress the heavy shuttling in the lean electrolyte, thus to acquire a high volumetric energy density without sacrificing gravimetric performance for realistic Li-S batteries (LSBs). Herein, we develop a cation-doping strategy to tailor the electronic structure and catalytic activity of MoSe2 that in situ hybridized with conductive Ti3C2Tx MXene, thus obtaining a Co-MoSe2/MXene bifunctional catalyst as a high-efficient sulfur host. Combining a smart design of the dense sulfur structure, the as-fabricated highly dense S/Co-MoSe2/MXene monolith cathode (density: 1.88 g cm(-3), conductivity: 230 S m(-1)) achieves a high reversible specific capacity of 1454 mAh g(-1) and an ultrahigh volumetric energy density of 3659 Wh L-1 at a routine electrolyte and a high areal capacity of similar to 8.0 mAh cm(-2) under an extremely lean electrolyte of 3.5 mu L mg s(-1) at 0.1 C. Experimental and DFT theoretical results uncover that introducing Co element into the MoSe2 plane can form a shorter Co-Se bond, impel the Mo 3d band to approach the Fermi level, and provide strong interactions between polysulfides and Co-MoSe2, thereby enhancing its intrinsic electronic conductivity and catalytic activity for fast redox kinetics and uniform Li2S nucleation in a dense high-sulfur-loaded cathode. This deep work provides a good strategy for constructing high-volumetric-energy-density, high-areal-capacity LSBs with lean electrolytes. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21708]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | Li, YY (corresponding author), Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wang, Wei,Huai, Liyuan,Wu, Shangyou,et al. Ultrahigh-Volumetric-Energy-Density Lithium-Sulfur Batteries with Lean Electrolyte Enabled by Cobalt-Doped MoSe2/Ti3C2Tx MXene Bifunctional Catalyst[J]. ACS NANO,2021,15(7):11619-11633. |
| APA | Wang, Wei.,Huai, Liyuan.,Wu, Shangyou.,Shan, Jiongwei.,Zhu, Junlu.,...&Li, Yunyong.(2021).Ultrahigh-Volumetric-Energy-Density Lithium-Sulfur Batteries with Lean Electrolyte Enabled by Cobalt-Doped MoSe2/Ti3C2Tx MXene Bifunctional Catalyst.ACS NANO,15(7),11619-11633. |
| MLA | Wang, Wei,et al."Ultrahigh-Volumetric-Energy-Density Lithium-Sulfur Batteries with Lean Electrolyte Enabled by Cobalt-Doped MoSe2/Ti3C2Tx MXene Bifunctional Catalyst".ACS NANO 15.7(2021):11619-11633. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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