阴极
电极
材料科学
电化学
法拉第效率
电压降
化学工程
高压
电压
储能
锂(药物)
比能量
化学
电气工程
医学
功率(物理)
物理
物理化学
量子力学
内分泌学
工程类
作者
Taolin Zhao,Liyao Chang,Rixin Ji,Shaokang Chen,Xiaoyu Jin,Yingdi Zheng,Xiyun Huang,Jiangang Shen,Yuxia Zhang
标识
DOI:10.1007/s10854-022-08530-0
摘要
Recently, all types of electrical equipment put forward increasing requirements on the energy density of secondary rechargeable batteries. The low specific capacity of cathode material is the primary factor that restricts the energy density of Li-ion batteries. Li-rich Mn-based cathode materials have the advantages of high specific capacity, high operating voltage, low cost, and environmental friendliness. However, they have the limitations of low first Coulombic efficiency and serious capacity/voltage attenuation. In this work, lithium polyacrylate (LiPAA) has been employed as a water-soluble binder in the electrode to develop a high-performance Li-rich Mn-based cathode. The effect of the LiPAA binder on voltage drop and electrochemical performance of Li[Li0.2Co0.13Ni0.13Mn0.54]O2 cathode has been examined to reveal the modification mechanism. The results show that carboxyl group (–COOH) in the LiPAA structure can form strong hydrogen bonds with the oxygen atoms in the active material, making the electrode components firmly bonded and thus maintaining the structural stability of the cathode upon cycling. Moreover, the LiPAA binder can effectively inhibit voltage drop of Li[Li0.2Co0.13Ni0.13Mn0.54]O2. The discharge voltage of the electrode decreases by only 117 mV after 50 cycles. Green water-soluble LiPAA has broad prospective applications as a binder of electrode materials of secondary batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI