在超级电容器电极中,直接将富含红素的黑色液体转化为活性炭
Karishma Jain1, Mandeep Singh1, Kushagra Yadav1
1Advanced Carbon Products and Metrology Department, CSIR-National Physical Laboratory (CSIR-NPL), New Delhi 110012, India; Academy of Scientific and Innovative Research, Ghaziabad, 201002, India.
International journal of biological macromolecules
|May 10, 2024
概括
本研究介绍了一种可持续的方法,将 kraft 工艺废物转化为活性炭 (BLAC). BLAC具有优越的表面积和电化学性能,使其成为超级电容器的理想选择.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 电化学 电化学 电化学
背景情况:
- 工业化需要可持续的废物管理解决方案.
- 强电工艺废弃物,特别是黑色液体红素,为价值化提供了机会.
- 目前用于素衍生活性炭的现有方法可能是能源密集型的,需要进行化学预处理.
研究的目的:
- 开发一种具有成本效益和可持续的方法,将 kraft 工艺废物转化为活性炭.
- 根据基准,评估新型活性炭 (BLAC) 的性能和性能.
- 探索BLAC作为超级电容器的电极材料的潜力.
主要方法:
- 采用水热辅助激活方法,直接将黑色液体红素转化为活性炭 (BLAC).
- 鉴定了BLAC的特征,并与酸洗的黑色液体红素衍生活性炭 (ABLAC) 和商业红素衍生活性炭 (SALAC) 相比较.
- 分析了表面积,多孔结构和电化学性能 (特定电容).
主要成果:
- 与ABLAC (1260 m2/g) 和SALAC (1558.4 m2/g) 相比,BLAC的表面积 (2277.2 m2/g) 显著增加.
- 黑色液体中固有的被确定为BLAC.增强表面积的关键因素.
- BLAC表现出卓越的电化学性能,其特异电容为871.4 F/g在1 A/g时.
结论:
- 黑色液体红素的直接水热转化是一种高效和可持续的途径,可获得高性能活性炭.
- 作为超级电容器应用的成本效益高的电极材料,BLAC显示出很大的前景.
- 与传统方法相比,这种更绿色的方法减少了预处理步骤,化学品的使用和能源消耗.
相关概念视频
Redox Reactions
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Batteries and Fuel Cells
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...
Nuclear Transmutation
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed protons being...
Electrochemical Cells
Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Concentration Cells
A concentration cell is an electrochemical cell in which the emf arises from a difference in concentration of a species between two half-cells. Unlike galvanic cells, where electrical energy comes from a chemical reaction, the driving force here is the transfer of matter from a region of higher concentration to lower concentration. The overall process is therefore physical in nature. A classic illustration is a cell made of two chlorine electrodes operating at different chlorine gas...
Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...


