带有电子缓冲的双原子对使超稳定循环全固态硫电池能够实现超稳定循环
Jiwei Shi1, Mingyang Jiang1, Chuannan Geng1
1Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center, Key Laboratory of Electrocatalytic Materials and Green Hydrogen Technology of Guangdong Higher Education Institutes, Shenzhen Key Laboratory for Graphene-based Materials, Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
National science review
|February 16, 2026
概括
研究人员开发了一种用于全固态硫电池 (ASSLSB) 的双金属催化剂. 这一策略稳定了单原子催化剂,通过缓冲电子活动显著提高了电池性能和寿命.
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
- 催化剂是一种催化剂.
背景情况:
- 全固态硫电池 (ASSLSBs) 提供高能量密度和安全性,但由于硫转化动力较慢而受到影响.
- 单原子催化剂 (SAC) 可以增强动力学,但由于金属中心重建,通常会降解.
研究的目的:
- 为ASSLSBs开发一个稳定的原子级催化剂.
- 为了克服与硫电催化中的传统SACs相关的降解问题.
主要方法:
- 在聚合物碳化物 (Cu1Ni1-PCN) 上定双金属Cu和Ni原子,以创建空间相邻的单原子对.
- 使用原子级电子缓冲策略,与电子阴性匹配的双金属位点.
- 通过d-p轨道杂交研究界面键和电子结构.
主要成果:
- Cu1Ni1-PCN催化剂表现出稳定的电子缓冲和动态度调制,抑制了催化剂的失活.
- 在2500个循环后,在1 mA cm-2.2下达到948 mAh g-1的高容量.
- 在 7000 个周期内,在 2 mA cm-2 时呈现出最小的容量衰变,这表明其具有特殊的长期稳定性.
结论:
- 电子缓冲是一种强大的策略,用于稳定ASSLSB中的原子级催化剂.
- 双金属Cu-Ni单原子对方法增强了界面相互作用和催化活性.
- 这项工作为设计下一代电池的高性能硫电催化剂提供了总体框架.
相关概念视频
03:12Batteries and Fuel Cells
31.1K
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...
31.1K
02:48Ionic Bonding and Electron Transfer
50.2K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
50.2K
04:02Weak Acid Solutions
43.6K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
43.6K
01:21DC Battery
1.3K
A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
1.3K
03:45Formation of Complex Ions
26.3K
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...
26.3K