用于阳极的聚乙烯 - - 酸 - - 基粘合剂
Karol Jagodziński1,2,3, Nicola Boaretto1, Nerea Casado4,5
1Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), 01510 Vitoria-Gasteiz, Spain.
概括
研究人员探索了离子电池中阳极的新结合剂. 完全化的聚乙烯-高酸结合剂表现出优越的粘附性和电化学性能,优于其他功能化结合剂和常规选项.
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:
- 高能量密度的离子电池 (LIB) 对电动汽车和电子产品至关重要.
- 富含的阳极提供了高的理论容量,但在循环过程中遭受体积膨胀.
- 离子导电结合剂可以提高阳极的稳定性和可循环性.
研究的目的:
- 为了合成和评估阳极的水溶性结合剂.
- 调查聚乙烯侧链功能化和水解比对粘合剂特性的影响.
- 评估使用这些新型结合剂的阳极的电化学性能和可加工性.
主要方法:
- 通过使用聚乙烯侧链和多变水解来功能化聚乙烯-高烯无水化物 (PEaMAn) 合成六种结合剂.
- 合成的结合剂的表征.
- 半电池的电化学性能评估,包括容量,循环稳定性和速率性能.
主要成果:
- 聚乙烯功能化结合剂降低了泥粘度,提高了电极可加工性.
- 这些结合剂对电流收集器的粘附性较差,阻抗增加较快.
- 完全水解的聚乙烯-高酸 (PEaMAc) 粘合剂表现出强大的粘合力和优异的电化学性能.
- PEaMAc获得了71.3%的初始库伦比效率和高解能力 (2230 mAh g-1 在C/10,1190 mAh g-1 在1C).
- PEaMAc比传统的LiPAA粘合剂表现更好.
结论:
- 完全化PEaMAc粘合剂是LIBs中阳极的有希望的候选物.
- 粘合剂的设计显著影响到电极的可加工性,粘合性和电化学性能.
- 优化粘合剂选择对于推进储能应用中的阳极技术至关重要.
相关概念视频
Types of Step-Growth Polymers: Polyesters
2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
Polymer Classification: Architecture
2.6K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.6K
Free-Radical Chain Reaction and Polymerization of Alkenes
7.6K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.6K
Characteristics and Nomenclature of Homopolymers
2.9K
Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
2.9K
Polymer Classification: Stereospecificity
2.4K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
2.4K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
1.9K


