具有丰富空隙的量子大小的Co纳米粒子使金属和快速聚硫化物转换的均沉积成为可能
Jinsheng Rong1, Jiangjiang Zhang1, Wenxin Wang1
1Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface, School of Sciences, Hebei University of Science and Technology, Shijiazhuang, 050018, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 11, 2024
概括
一种新型的双重功能材料,在半孔碳 (v-Co/meso-C) 上具有丰富空位的量子尺寸的Co纳米点,有效地抑制硫酸转运和硫酸 (Li-S) 电池中的树生长,从而实现稳定和高效的电化学性能.
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 (Li-S) 电池面临着巨大的市场化挑战,原因是聚硫化物转运和树的增长.
- 开发先进的材料对于克服这些局限性和提高电池性能和安全至关重要.
研究的目的:
- 提出和研究一种新型的双重功能材料,即在半孔碳层 (v-Co/meso-C) 上的富含空隙量子尺寸的Co纳米点.
- 评估v-Co/meso-C在抑制 Li-S 电池中聚硫化物穿和树生长中的有效性.
- 为了证明v-Co/meso-C在高性能和长周期Li-S电池应用中的潜力.
主要方法:
- 富含空位的量子尺寸Co纳米点的合成,这些纳米点在一个半孔碳层上 (v-Co/meso-C).
- 对v-Co/meso-C作为金属宿主和硫阴极材料在半细胞和对称细胞中的电化学表征.
- 使用v-Co/meso-C@Li和v-Co/meso-C@S电极制造和测试一个完整的Li-S电池.
- 实验和理论计算以了解聚硫化物吸附和催化转换的机制.
主要成果:
- v-Co/meso-C表现出极好的化和硫化性,促进的均沉积,并抑制树石的形成.
- 该材料有效地增强了聚硫化物吸附和催化转化,减轻了穿效应.
- 全电池表现出极好的速率性能 (在5.0°C时为739mAhg-1),以及良好的循环稳定性与低容量衰变.
- 高硫负载和精益电解质的囊细胞在50个循环后保持80%的容量.
结论:
- v-Co/meso-C是一种高效的双功能材料,用于解决Li-S电池技术的关键挑战.
- 拟议的材料使得无树和无穿的Li-S电池具有卓越的性能和寿命.
- 这项工作为设计下一代储能系统的先进材料提供了宝贵的见解.
更多相关视频
10:58Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
Published on: March 7, 2018
10.1K
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
3.5K
相关概念视频
Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
