对于密集集群存储的硬碳,纳米封闭诱导的高速率性能
Lian Chen1,2, Fan Li2, Kaiyang Liu2
1Qingyuan Innovation Laboratory 1 Xueyuan Road Quanzhou 362801 P. R. China yxtang@fzu.edu.cn.
Chemical science
|January 28, 2026
概括
石墨烯引导纤维素衍生的硬碳,以实现离子电池的高速率性能. 这种纳米封闭策略提高了容量和初始库伦比克效率,使大规模的能源存储成为可能.
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:
- 硬碳是离子电池的有希望的阳极,但其初始库伦比效率 (ICE),容量和速率性能较低.
- 这些局限性源于虚伪石墨结构差异和不受控制的集群形成.
研究的目的:
- 开发一种纳米封闭策略,使用石墨烯引导的石墨化来制造纤维素衍生的硬碳.
- 为了提高高速率离子电池硬碳阳极的性能.
主要方法:
- 利用了纤维素衍生的硬碳的石墨烯定向导向石墨化.
- 在石墨烯上使用氧功能组与纤维素进行交联以抑制缺陷.
- 利用sp2混合的碳骨架来指导碳层的排列,创建一个狭窄的结构.
主要成果:
- 实现了323.9 mAh g-1的高特异容量,89.9%的ICE,以及出色的速率性能 (226.8 mAh g-1在3.0 A g-1).
- 通过纳米封闭诱导观察到金属集群,并通过微孔封闭证明可控制的密度.
- 验证了一种用于集群密集的新机制,涉及吸附,介质和孔隙填充.
结论:
- 纳米封闭感应对于开发高速率硬碳阳极是有效的.
- 优化的结构促进了伪图形域和可调节孔,提高了离子电池的性能.
- 这种方法促进了离子电池在大型能源存储系统中的应用.
相关概念视频
Storage
402
A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
402
The Carbon Cycle
43.7K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.7K
Toughness and Hardness of Aggregate
615
Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in...
615
Carbon Skeletons
114.8K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
114.8K
Regulation of Sodium and Potassium
2.2K
The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
2.2K
Cluster Sampling Method
14.5K
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
14.5K


