Atsbeha Kahsay Berhanemeskel, Wang Fu-Ming, Hailu Alem Gebrelibanos, Su Chia-Hung
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
Sustainable Energy Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
Polymers (Basel). 2020 May 13;12(5):1109. doi: 10.3390/polym12051109.
Low-molecular-weight carbonyl-containing compounds are considered beneficial energy storage materials in alkali metal-ion/alkaline earth metal-ion secondary batteries owing to the ease of their synthesis, low cost, rapid kinetics, and high theoretical energy density. This study aims to prepare a novel carbonyl compound containing a maleamic acid (MA) backbone as a material with carbon black to a new MA anode electrode for a lithium-ion battery. MA was subjected to attenuated total reflection-Fourier-transform infrared spectroscopy, and its morphology was assessed through scanning electron microscopy, followed by differential scanning calorimetry to determine its thermal stability. Thereafter, the electrochemical properties of MA were investigated in coin cells (2032-type) containing Li metal as a reference electrode. The MA anode electrode delivered a high reversible capacity of about 685 mAh g in the first cycle and a higher rate capability than that of the pristine carbon black electrode. Energy bandgap analysis, electrochemical impedance, and X-ray photoelectron spectroscopy revealed that MA significantly reduces cell impedance by reforming its chemical structure into new nitrogen-based highly ionic diffusion compounds. This combination of a new MA anode electrode with MA and carbon black can increase the performance of the lithium-ion battery, and MA majorly outweighs transitional carbon black.
低分子量含羰基化合物因其易于合成、成本低、动力学快和理论能量密度高，被认为是碱金属离子/碱土金属离子二次电池中有益的储能材料。本研究旨在制备一种含有马来酰胺酸（MA）主链的新型羰基化合物，作为一种材料与炭黑一起用于锂离子电池的新型MA负极。对MA进行衰减全反射傅里叶变换红外光谱分析，并通过扫描电子显微镜评估其形态，随后进行差示扫描量热法以确定其热稳定性。此后，在以锂金属为参比电极的扣式电池（2032型）中研究了MA的电化学性能。MA负极在第一个循环中提供了约685 mAh g的高可逆容量，且倍率性能高于原始炭黑电极。能带隙分析、电化学阻抗和X射线光电子能谱表明，MA通过将其化学结构重整为新的氮基高离子扩散化合物，显著降低了电池阻抗。这种新型MA负极与MA和炭黑的组合可以提高锂离子电池的性能，并且MA大大优于过渡炭黑。
