相关实验视频
Updated: May 16, 2025

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
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通过封装聚氨的工程来提高V2O5·nH2O的离子储存
Juntao Wang1, Ziqi Ren2, Xianfang Tan1
1Hubei Key Laboratory of Radiation Chemistry and Functional Materials, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, PR China.
Journal of colloid and interface science
|April 4, 2025
概括
研究人员开发了一种VOH@PANI核心外材料,以增强离子超级电容器 (NH4+-SCs). 这种新的结构提高了稳定性和能量储存,解决了基于氧化瓦纳的设备的关键挑战.
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:
- 氧化瓦纳是水性离子超级电容器 (NH4+-SC) 的一个有前途的电极材料.
- 挑战包括在循环过程中溶解,结构崩和氧化瓦纳的低导电性.
- 对于NH4+-SCs,需要稳定和高性能宿主材料.
研究的目的:
- 为NH4+-SCs.设计和开发一种新的宿主材料.
- 为了提高氧化瓦纳的结构稳定性和离子储存能力.
- 解决氧化瓦纳电极中溶解和低导电性的问题.
主要方法:
- 一种简单的热水方法被用于涂层聚氨 (PANI) 在V2O5·nH2O (VOH) 纳米带上.
- 这创建了一个V2O5·nH2O@polyaniline (VOH@PANI) 核心外复合结构.
- 评估了电化学性能,并进行了理论计算.
主要成果:
- VOH@PANI核心外纳米带表现出增强的结构稳定性和改进的离子/电荷转移动态.
- 复合材料在0.5A·g-1时达到453F·g-1的特定电容,明显高于原始的VOH (271F·g-1) 和PANI (295F·g-1).
- 使用VOH@PANI阴极和活性碳 (AC) 阳极的混合超级电容器 (HSC) 显示出良好的电化学性能.
结论:
- VOH@PANI核心外复合材料是NH4+-SCs的有效宿主材料,提供卓越的电容和稳定性.
- PANI外成功地防止了结构崩,并提高了导电性,克服了赤裸裸的氧化的局限性.
- 这种方法为开发用于储能应用的先进电极材料提供了可行的策略.
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Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
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Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
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Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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