摘要
采用碳布(CC)为柔性基底,通过水热法制备了MnO_(2)/CC及N掺杂MnO_(2)/CC无黏结剂负极材料,借助X射线衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)、比表面积测试和恒电流充放电对材料进行了结构表征及电化学性能测试。结果表明N掺杂MnO_(2)/CC具有良好的倍率性能和循环稳定性。在0.1 A·g^(-1)的电流密度下,其首次充电比容量为948.8 mAh·g^(-1),经过不同倍率测试后电流密度恢复至0.1 A·g^(-1)时仍然保持有907.9 mAh·g^(-1)的可逆比容量,容量保持率为95.7%。在1 A·g^(-1)的大电流密度下,其首次充电比容量为640.3 mAh·g^(-1),循环100次后仍然保持有529.9 mAh·g^(-1)的可逆比容量,容量保持率为82.8%,可逆比容量远高于商用MnO_(2)。
MnO_(2)/CC and N doped MnO_(2)/CC binderless anode materials were prepared by hydrothermal method with carbon cloth(CC)as a flexible substrate,and the structure characterization and electrochemical performance of the materials were tested by means of X-ray diffraction(XRD),scanning electron microscope(SEM),X-ray photoelec-tron spectroscopy(XPS),specific surface area test and galvanostatic charge and discharge.The results showed that Ndoped MnO_(2)/CC had good rate performance and cycle stability.The first charge specific capacity of Ndoped MnO_(2)/CC was 948.8 mAh·g^(-1) at the current density of 0.1 A·g^(-1),and the reversible specific capacity remained 907.9 mAh·g^(-1) when the current density returned to 0.1 A·g^(-1) after different rate tests,and the capacity retention rate was 95.7%.At the high current density of 1 A·g^(-1),the initial charging specific capacity of N doped MnO_(2)/CC was 640.3 mAh·g^(-1),the reversible specific capacity still retained 529.9 mAh·g^(-1) after 100 cycles,and the capacity retention rate was 82.8%.The reversible specific capacity was much higher than that of commercial MnO_(2).
作者
夏傲
韩曰朋
曾啸雄
赵晨鹏
谈国强
XIA Ao;HAN Yue-Peng;ZENG Xiao-Xiong;ZHAO Chen-Peng;TAN Guo-Qiang(School of Materials Science and Engineering,Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials,Shaanxi University of Science&Technology,Xi′an 710021,China)
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2021年第12期2175-2184,共10页
Chinese Journal of Inorganic Chemistry
基金
中国博士后科学基金(No.2016M592746)
陕西科技大学博士创业资助计划(No.BJ15-04)资助。
