锂(药物)
材料科学
介电谱
X射线光电子能谱
阴极
电化学
磷酸
化学工程
表面改性
冶金
复合材料
电极
化学
工程类
物理化学
内分泌学
医学
作者
Ryan Brow,Anthony Donakowski,Alex Mesnier,Drew Joseph Pereira,K. Xerxes Steirer,Shriram Santhanagopalan,Arumugam Manthiram
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-06-08
卷期号:5 (6): 6996-7005
被引量:12
标识
DOI:10.1021/acsaem.2c00606
摘要
Nickel-rich cathode materials are quickly becoming the next commercial cathode for electric vehicles; however, their long-term cycle life retention and air stability remain a barrier to the use of these lower-cost, higher-energy density materials. Surface reactivity and mechanical degradation, especially at high voltages, remain two issues that impede these material’s commercialization. While surface treatments have shown great promise in reducing surface reactivity, mechanical degradation or “cathode cracking” persists yet. In the present work, LiNi0.9Mn0.05Al0.05O2 (NMA) cathode materials are first pulverized into their primary particle constituents and then coated with lithium phosphate via solution-based chemistry with varying concentrations of phosphoric acid. The cathodes are characterized using energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, electrochemical impedance spectroscopy, and electrochemical cycling. After 100 cycles, the pulverized NMA cathodes coated using the lowest concentration of phosphoric acid show delayed voltage decay and double the discharge capacity compared to the pristine material in full cells during high-voltage cycling.
科研通智能强力驱动
Strongly Powered by AbleSci AI