通过4-基酸盐电解质添加剂实现高度可逆的水性离子电池
Mingyan Li1,2, Junyi Yin1, Xiang Feng1
1State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, 28 West Xianning Road, Xi'an, 710049, China.
ChemSusChem
|October 18, 2023
概括
4-基酸盐 (PHB) 增强水性离子电池 (AZIB) 通过防止副作用和树生长. 这种添加剂提高了阳极的稳定性,使得储能应用的周期寿命更长,效率更高.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 提供安全和经济高效的能源存储.
- 关键的挑战包括的进化,腐蚀和树的生长,阻碍了AZIB的实施.
研究的目的:
- 为了研究4-基酸盐 (PHB) 作为电解质添加剂的有效性,以稳定AZIB中的阳极.
- 通过表面修饰和受控的离子沉积来提高阳极的可逆性和循环寿命.
主要方法:
- 使用PHB作为阳极的ZnSO4电解质中的添加剂.
- 研究了PHB与表面的结合亲和力及其固体效应.
- 使用Zn/Zn,Zn/Cu和Zn/NH4V4O10电池配置进行评估的电池性能.
主要成果:
- 补充PHB显著抑制了不良副作用,如进化和腐蚀.
- 在 Zn/Zn 电池中在 1 mA cm−2.2. 达到超过 1600 小时的稳定循环.
- 在Zn/Cu电池中,在500个循环中显示出高的平均库伦比效率 (98.6%).
- 具有PHB的Zn/NH4V4O10电池在1000个循环后在10 A g-1.1下维持了80.5 mAh g-1.
结论:
- PHB通过阻碍水相互作用和促进均的Zn2+涂层来有效地稳定阳极.
- 作为一种廉价的电解质添加剂,PHB的应用显示出提高AZIB的稳定性和可靠性的巨大潜力.
相关概念视频
Batteries and Fuel Cells
27.6K
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...
27.6K
Diazonium Group Substitution: –OH and –H
2.8K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
2.8K
Electrolysis
26.6K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.6K
Standard Electrode Potentials
44.1K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
44.1K
Leveling Effect and Non-Aqueous Acid-Base Solutions
8.1K
This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
8.1K
Titration in Nonaqueous Solvents
827
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
827


