当前位置：
X-MOL 学术
›
Chem. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Conductive and Polar Titanium Boride as a Sulfur Host for Advanced Lithium–Sulfur Batteries
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-09-23 00:00:00 , DOI: 10.1021/acs.chemmater.8b01352 Chuanchuan Li 1 , Xiaobiao Liu 2 , Lin Zhu 1 , Renzhi Huang 1 , Mingwen Zhao 2 , Liqiang Xu 1 , Yitai Qian 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2018-09-23 00:00:00 , DOI: 10.1021/acs.chemmater.8b01352 Chuanchuan Li 1 , Xiaobiao Liu 2 , Lin Zhu 1 , Renzhi Huang 1 , Mingwen Zhao 2 , Liqiang Xu 1 , Yitai Qian 1
Affiliation
|
Lithium–sulfur batteries are the most promising candidates for advanced electrochemical energy storage systems benefiting from their high energy density and low cost of sulfur. Improving the conductivity of sulfur cathode and stabilizing the polysulfide shuttle are the key factors for obtaining high-performance lithium–sulfur batteries. Herein, metallic and polar TiB2 nanomaterials are applied for the first time as sulfur hosts. The 70S/TiB2 composite exhibits a long-term cycling stability up to 500 cycles at the current density of 1 C. It is worth noting that even when the sulfur areal mass loading is up to 3.9 mg cm–2, a stable capacity of 837 mA h g–1 can be still maintained after 100 cycles. The outstanding electrochemical performance can be attributed to the strong anchoring effect of TiB2 to lithium polysulfides, which is confirmed by the X-ray photoelectron spectroscopy analyses and theoretical calculations with a favorable surface-passivated chemistry. The study presented here will shed a new light for metal borides as hosts to improve the cycling life of lithium–sulfur batteries and provide a deep comprehension of the instinct interaction evolution at a molecular level, which is invaluable in the material rational fabrication for future high-performance Li–S batteries.
中文翻译：
导电和极性硼化钛作为高级锂硫电池的硫基质
锂硫电池的高能量密度和低硫成本使其成为先进的电化学储能系统的最有希望的候选者。提高硫阴极的电导率和稳定多硫化物梭是获得高性能锂硫电池的关键因素。在本文中，金属和极性TiB 2纳米材料首次用作硫主体。70S / TiB 2复合材料在1 C的电流密度下表现出高达500次循环的长期循环稳定性。值得注意的是，即使硫的单位面积质量负载高达3.9 mg cm –2，其稳定容量仍为837 mA汞柱–1100个周期后仍可保持。出色的电化学性能可归因于TiB 2对多硫化锂的强锚固作用，这已通过X射线光电子能谱分析和具有良好表面钝化化学性质的理论计算得到了证实。此处进行的研究将为金属硼化物作为宿主提高锂硫电池的循环寿命提供新的思路，并提供对分子水平本能相互作用演化的深刻理解，这对于合理的材料制备对于未来的高价应用而言具有不可估量的价值。高性能的Li–S电池。
更新日期：2018-09-23
中文翻译：
导电和极性硼化钛作为高级锂硫电池的硫基质
锂硫电池的高能量密度和低硫成本使其成为先进的电化学储能系统的最有希望的候选者。提高硫阴极的电导率和稳定多硫化物梭是获得高性能锂硫电池的关键因素。在本文中，金属和极性TiB 2纳米材料首次用作硫主体。70S / TiB 2复合材料在1 C的电流密度下表现出高达500次循环的长期循环稳定性。值得注意的是，即使硫的单位面积质量负载高达3.9 mg cm –2，其稳定容量仍为837 mA汞柱–1100个周期后仍可保持。出色的电化学性能可归因于TiB 2对多硫化锂的强锚固作用，这已通过X射线光电子能谱分析和具有良好表面钝化化学性质的理论计算得到了证实。此处进行的研究将为金属硼化物作为宿主提高锂硫电池的循环寿命提供新的思路，并提供对分子水平本能相互作用演化的深刻理解，这对于合理的材料制备对于未来的高价应用而言具有不可估量的价值。高性能的Li–S电池。
京公网安备 11010802027423号