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| 1 | 锂电池研究中的EIS实验测量和分析方法显示文摘电化学阻抗谱是一种重要的电化学测试方法,在电化学领域尤其是锂离子电池领域具有广泛的应用,如电导率、表观化学扩散系数、SEI的生长演变、电荷转移及物质传递过程的动态测量。本文介绍了电化学阻抗谱的基本原理、测试方法、测试注意事项、常用电化学阻抗测量设备及测试流程,并结合实际案例,具体分析了电化学阻抗谱在锂离子电池中的应用。 | 凌仕刚 许洁茹 李泓 | 2018 | 储能科学与技术2018，7，4： | 11 |
| 2 | Mechanism of intercalation and deintercalation of lithium ions in graphene nanosheets显示文摘Graphene nanosheets (GNSs) were synthesized by reducing exfoliated graphite oxides. Their structure, surface morphology and lithium storage mechanism were characterized and investigated systematically using X-ray diffraction, atomic force microscopy, scanning electron microscopy, charge-discharge tests, cyclic voltammetry and electrochemical impedance spectroscopy. It was found that the GNSs, which were obtained via chemical synthesis, were primarily less than 10 graphene layers. The GNS electrodes, which were fabricated from the reduced GNSs, exhibited an enhanced reversible lithium storage capacity and good cyclic stability when serving as anodes in lithium-ion batteries. Also, the first-cycle irreversible capacities of the system were relatively high, because of the formation of a solid electrolyte interphase film on the surface of the GNS electrode and the spontaneous stacking of GNSs during the first lithiation. The electrochemical impedance spectroscopy results suggest that the solid electrolyte interphase film on the GNS electrode during first lithiation were primarily formed at potentials between 0.95 and 0.7 V. Also, the symmetry factor of the charge transfer was measured to be 0.446. | TIAN LeiLei ZHUANG QuanChao LI Jia SHI YueLi CHEN JianPeng LU Feng SUN ShiGang | 2011 | Chinese Science Bulletin2011，56，30： | 11 |
| 3 | Influence of Cr^(3+) concentration on the electrochemical behavior of the anolyte for vanadium redox flow batteries显示文摘The composition of electrolyte affects to a great extent the electrochemical performance of vanadium redox flow batteries(VRB).The effects of Cr3+ concentration in the anolyte on the electrode process of V(V)/V(IV) couple have been investigated by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).It was found that Cr3+ causes no side reactions,but affects the electrochemical performance of V(V)/V(IV) redox reaction,including the reaction activity,the reversibility of electrode reaction,the diffusivity of vanadium ions,the interface film impedance,and the electrode reaction impedance.The experimental results show that Cr3+ within a certain concentration range can improve the reversibility of electrode reaction and the diffusion of vanadium ions.With the Cr3+ concentration increasing from 0 to 0.30 g L-1,the reversibility of V(V)/V(IV) reaction increases,while the diffusion resistance decreases.Correspondingly,the diffusion coefficient of vanadium ions increases from(5.48-6.77) × 10-7 to(6.82-8.44) × 10-7 cm2 s-1,an increase of ~24%.However,the diffusion resistance increases and the diffusion coefficient decreases when Cr3+ concentration is over 0.30 g L-1,while the impedances of the interface,the film as well as the charge transfer increase continuously.As a result,Cr3+ with a certain concentration improves the diffusion and mass transfer process,but the resistances of the film,the interface,and the charge transfer rise.Furthermore,Cr3+ concentration of no more than 0.10 g L-1 has few effect on the electrode reaction process,and that of no more than 0.30 g L-1 is favorable to the diffusion of vanadium ions. | HUANG Fei ZHAO Qiang LUO ChunHui WANG GuiXin YAN KangPing LUO DongMei | 2012 | Chinese Science Bulletin2012，57，32： | 4 |
| 4 | 锂离子电芯电压测量电路研究显示文摘锂离子单电芯电压的精确测量是锂离子电池组电池管理系统所必备的重要功能,本研究探讨多个合适的锂离子单电芯电压测量电路,如分压电阻测量电路、差动放大器测量电路、模拟多任务器加差动放大器测量电路、光继电器加差动放大器测量电路、光继电器测量电路、多任务器加光继电器测量电路,深入研究各个电压测量电路优缺点,并自行开发出一个基于DMOS组件的锂离子电芯电压测量电路,本文除了对本电路做详细的描述,并以实际测量结果显示本电压测量具有高精确度与可靠度。 | 沈红雷 | 2016 | 电子技术(上海)2016，0，8： | 0 |
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