电催化剂促进Li2S的氧化还原动力学和调节Li2S核化,用于硫电池
Fengfeng Han1, Liwen Fan2, Zhiguo Zhang3
1Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|November 22, 2023
概括
集成到生物质衍生碳中的纳米颗粒通过抑制聚硫化物转运和改善硫化形成来提高硫电池性能. 这提高了电池容量和循环寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫电池 (LSB) 面临的挑战是聚硫化物 (LiPS) 穿效应和缓慢的Li2S核化.
- 开发具有集成电催化剂的有效硫宿主材料对于LSB的进步至关重要.
研究的目的:
- 通过解决聚硫化物穿和Li2S核化问题来提高硫电池的性能.
- 调查 (Pt) 纳米颗粒作为生物质衍生碳宿主中的电催化剂在LSBs中的作用.
主要方法:
- 在生物质衍生碳材料上沉积Pt纳米颗粒的溶液沉积.
- 电化学运动分析和经典的电化学沉积模型.
- 在LSB中制造和电化学测试硫阴极.
主要成果:
- Pt纳米粒子增强了电导率,固定了LiPSs,并催化了硫氧化还原反应.
- Pt调节3D Li2S沉积和生长,减少反应能量障碍.
- 开发的阴极实现了高的初始特异性容量 (1019.1 mAh g-1在1 C) 和出色的稳定性 (0.045%衰变超过1500个周期).
结论:
- 将Pt纳米颗粒集成到生物质衍生碳中,是LSB的一个有效策略.
- 这种方法显著改善了聚硫化物转化动力学,并调节了Li2S核化.
- 该研究表明,对于高性能和稳定的硫电池来说,这是一个有前途的途径.
相关概念视频
Batteries and Fuel Cells
27.5K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.5K
Electrodeposition
640
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
640
Formation of Complex Ions
23.7K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.7K


