向具有优越存性能的硬碳中高度选择性的异原子补充剂
Xingyu Cai1, Ying Xu1, Fan Mo1
1School of Electronic and Information Engineering, Jiangsu Laboratory of Advanced Functional Materials, Changshu Institute of Technology, Changshu 215500, China.
ACS applied materials & interfaces
|June 8, 2023
概括
对离子电池 (LIB) 提供了更好的性能. 本研究提出了一种新的策略,用于为LIB应用程序创建具有增强速率能力和稳定性的合硬碳阳极.
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:
- 硬碳 (HC) 是高能量密度离子电池 (LIB) 的有希望的阳极.
- 关键的挑战包括电压歇斯底里,低速率能力和初始不可逆转能力.
- 解决这些局限性对于广泛的LIB应用至关重要.
研究的目的:
- 制定制造异质原子 (N/S/P/Se) 合硬碳阳极的总体策略.
- 为了提高LIBs硬碳阳极的速率能力和周期稳定性.
- 调查储存在化硬碳中的潜在机制.
主要方法:
- 一个有层次的多孔结构的三维 (3D) 框架的制造.
- 硬碳的异原子兴奋剂 (N,S,P,Se) 硬碳.
- 电化学性能测试 (速率能力,周期稳定性).
- 电化学运动分析和理论计算.
主要成果:
- 在N-doped硬碳 (NHC) 阳极表现出极好的速率能力 (315mAhg-1在10.0Ag-1).
- 实现了特殊的长期循环稳定性 (90.3%的容量保留在1000个循环后在3A g-1).
- 袋式电池实现了高能量密度 (483.8 W h kg-1) 和快速充电能力.
- 异原子兴奋剂显著影响离子吸附和扩散.
结论:
- 成功开发了一种用于制造高性能异原子合硬碳阳极的多功能策略.
- 强化硬碳显示出下一代LIBs的巨大潜力.
- 这项工作为设计用于储能应用的先进碳材料提供了洞察力.
相关概念视频
01:25MOS Capacitor
860
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
860
02:18Network Covalent Solids
13.6K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
13.6K
02:54Trends in Lattice Energy: Ion Size and Charge
24.0K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
24.0K