Nanthagopal Murugan, Ho Chang Won, Shaji Nitheesha, Sim Gyu Sang, Varun Karthik Murugesan, Kim Hong Ki, Lee Chang Woo
Department of Chemical Engineering (Integrated Engineering), College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin 17104, Gyeonggi, Korea.
Center for the SMART Energy Platform, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin 17104, Gyeonggi, Korea.
Nanomaterials (Basel). 2022 Mar 16;12(6):984. doi: 10.3390/nano12060984.
Sodium-ion batteries (SIBs) have emerged as an alternative candidate in the field of energy storage applications. To achieve the commercial success of SIBs, the designing of active materials is highly important. O3-type layered-NaFeMnO (NFM) materials provide higher specific capacity along with Earth-abundance and low cost. Nevertheless, the material possesses some disadvantages, such as a low rate capability and severe capacity fading during cycling. To overcome such drawbacks, composite O3-type layered NFM with carbon has been prepared for the cathode electrode of SIBs through a facile solution combustion method followed by calcination process. The introduction of carbon sources into NFM material provides excellent electrochemical performances; moreover, the practical limitations of NFM material such as low electrical conductivity, structural degradation, and cycle life are effectively controlled by introducing carbon sources into the host material. The NFM/C-2 material delivers the specific charge capacities of 171, 178, and 166 mA h g; and specific discharge capacities of 188, 169, and 162 mA h g, in the first 3 cycles, respectively.
钠离子电池（SIBs）已成为储能应用领域的替代候选者。为实现钠离子电池的商业成功，活性材料的设计至关重要。O3型层状NaFeMnO（NFM）材料具有较高的比容量，且储量丰富、成本低廉。然而，该材料存在一些缺点，如倍率性能低以及循环过程中容量严重衰减。为克服这些缺点，通过简便的溶液燃烧法并随后进行煅烧工艺，制备了用于钠离子电池正极的碳复合O3型层状NFM。将碳源引入NFM材料可提供优异的电化学性能；此外，通过将碳源引入主体材料，有效控制了NFM材料的实际局限性，如低电导率、结构降解和循环寿命。NFM/C-2材料在前三个循环中的比充电容量分别为171、178和166 mA h/g；比放电容量分别为188、169和162 mA h/g。
