CCS Chemistry最新文献_第5页

Growing a Lamination Structure of Graphdiyne/Nickel Sulfide for Oxygen Evolution Reaction 生长用于氧进化反应的石墨二炔/硫化镍层状结构

IF 11.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

CCS Chemistry

Pub Date : 2024-09-05 DOI: 10.31635/ccschem.024.202404426

CCS Chemistry, Ahead of Print.

引用次数: 0

Strain Engineering of Multimetallic Nanomaterials for Advanced Electrocatalysis 用于先进电催化的多金属纳米材料应变工程

IF 11.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

CCS Chemistry

Pub Date : 2024-09-03 DOI: 10.31635/ccschem.024.202404677

CCS Chemistry, Ahead of Print.

引用次数: 0

p-Type Organic Cathode Materials with Oxygen Atoms as Active Sites for High-Performance Organic Batteries 以氧原子为活性位点的 p 型有机阴极材料用于高性能有机电池

IF 11.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

CCS Chemistry

Pub Date : 2024-09-03 DOI: 10.31635/ccschem.024.202404506

Zixuan Chen, Tongyao Liang, Jixing Yang, Yunhua Xu, Yuesheng Li

Organic electrode materials for lithium-ion batteries (LIBs) have attracted increasing attention due to their potential low cost and renewability. Although oxygen atoms have been the most common redox-active sites of n-type organic electrode materials, it is a great challenge to develop high-performance oxygen-based p-type materials. In this study, we designed and synthesized two organic cathode materials with benzofuran (BF) as the active unit. Connecting two BF units onto para-positions of benzene or pyrazine increased the molecular size and maintained the planar structure, which facilitated enhanced intermolecular interaction, and thus, reduced solubility. Importantly, we found that the target molecules could undergo in situ electropolymerization during the charging process inside the batteries, which further reduced the solubility and stabilized the electrode structure. Electrochemical tests showed that the optimized cathode materials could reach 99.5% of theoretical capacity in LIBs, with a high capacity of up to 170.9 mAh g⁻¹. In addition, they could be stably cycled 5,000 times with a high capacity retention of 75.1%, which corresponded to an average capacity loss of only 0.005% per cycle. These exciting results should arouse much interest in the study of p-type organic cathode materials with oxygen atoms as active sites.

用于锂离子电池（LIB）的有机电极材料因其潜在的低成本和可再生性而受到越来越多的关注。虽然氧原子一直是 n 型有机电极材料中最常见的氧化还原活性位点，但开发高性能的氧基 p 型材料仍是一个巨大的挑战。在本研究中，我们设计并合成了两种以苯并呋喃（BF）为活性单元的有机阴极材料。将两个苯并呋喃单元连接到苯或吡嗪的对位上，既增大了分子尺寸，又保持了平面结构，有利于增强分子间相互作用，从而降低了溶解度。重要的是，我们发现目标分子可以在电池内部充电过程中发生原位电聚合，从而进一步降低溶解度并稳定电极结构。电化学测试表明，优化后的阴极材料在 LIB 中可达到理论容量的 99.5%，容量高达 170.9 mAh g-1。此外，它们还可以稳定地循环使用 5,000 次，容量保持率高达 75.1%，相当于每次循环的平均容量损失仅为 0.005%。这些令人兴奋的结果应该会引起人们对以氧原子为活性位点的 p 型有机阴极材料研究的浓厚兴趣。

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引用次数: 0

Intracellular Construction of Topological Polymer Networks to Destruct Organelles 细胞内构建拓扑聚合物网络以破坏细胞器

IF 11.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

CCS Chemistry

Pub Date : 2024-09-03 DOI: 10.31635/ccschem.024.202404842

Chengfei Liu, Banruo Xianyu, Chaowei He, Muqing Cao, Zhuolin Chen, Tianyu Li, Huaping Xu

CCS Chemistry, Ahead of Print.