通过LiOH形成和分解循环运行Li-O2电池
Tao Liu1, Michal Leskes1, Wanjing Yu2
1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
概括
研究人员使用减少的氧化石墨烯电极和酸添加剂开发了一种新的气电池. 这种设计可实现可逆氧化物形成,实现高容量和高能效的先进储能.
科学领域:
- 电化学
- 材料科学
- 能量储存
背景情况:
- 可充电的气 (Li-O2) 电池为下一代储能提供了很大的潜力.
- 由于循环和产品管理方面的挑战,对2电池的实际实施受到阻碍.
研究的目的:
- 为了研究超出过氧化物形成的Li-O2细胞的替代循环机制.
- 提高2电池的特定容量,能源效率和可充电性.
主要方法:
- 使用了减少的石墨烯氧化物电极,酸添加剂和二氧化乙溶剂.
- 专注于可逆形成和去除晶体氧化物 (LiOH).
- 研究了水度对排放产品和电池性能的影响.
主要成果:
- 实现大粒度 (> 15 微米) 晶体LiOH的可逆形成和去除.
- 具有很高的特定容量和卓越的能效 (93.2%) 与狭窄的电压差距 (0.2V).
- 观察到令人印象深刻的充电性和对高水度的耐受性.
结论:
- 使用LiI和水的Li-O2电池设计可实现LiOH循环,克服Li2O2形成的限制.
- 放电产品的化学性质受到LiI和水的显著影响,从而提高了电池的性能.
- 这种方法为开发高性能可充电2电池提供了可行的途径.
更多相关视频
11:25Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
Published on: March 7, 2022
5.5K
10:41The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation
Published on: July 18, 2018
16.3K
相关概念视频
Batteries and Fuel Cells
32.0K
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...
32.0K
Weak Acid Solutions
45.2K
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...
45.2K
The Citric Acid Cycle: Overview
24.4K
In aerobic organisms, the citric acid cycle is the second stage of cellular respiration wherein molecules derived from the breakdown of carbohydrates, proteins, and fats are oxidized into carbon dioxide and energy. This process is also known as the tricarboxylic acid (TCA) cycle as the first product of the cycle, citric acid, contains three carboxyl groups in its structure. Alternatively, this cycle is also referred to as the Krebs cycle, in honor of its discoverer Sir Hans Krebs.
The citric...
The citric...
24.4K
Electron Transport Chains
116.5K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...
116.5K
The Citric Acid Cycle
166.3K
The citric acid cycle, also known as the Krebs cycle or TCA cycle, consists of several energy-generating reactions that yield one ATP molecule, three NADH molecules, one FADH2 molecule, and two CO2 molecules.
166.3K
Metabolism of Chemolithotrophs
1.2K
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
1.2K
