Preparation of graphite-based lead carbon cathode and its performance of batteries

Micro & nano letters

article

Hao Shen¹  Ye Jin¹  Zhiyuan Zhao²  Yuzhen Sun²  Bing Huang²  Jian Wang¹ 

[1] College of Chemistry and Chemical Engineering, Nanjing Tech University;School of Chemistry and Chemical Engineering, Yancheng Teachers University

关键词: electrochemical electrodes;    secondary cells;    voltammetry (chemical analysis);    graphite;    reduction (chemical);    electrochemistry;    composite materials;    scanning electron microscopy;    lead;    electro-deposited;    positive electrode;    electrochemical performance;    scanning electron microscopy images;    three-dimensional porous structure;    active lead;    electrode structure;    PGP composite;    high conductivity;    battery;    graphite-based lead carbon cathode;    porous graphite/lead conductive substrate;    lead-graphite-lead composite material;    electrochemically treated graphite/lead conductive substrate;    graphite/lead composite;    voltage 2.2 V;    Pb;   

DOI  :  10.1049/mnl.2018.5502

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A novel type of active Pb was electro-deposited on a porous graphite/Pb conductive substrate to form Pb-graphite-Pb (PGP) composite material, which was used as a positive electrode to study its electrochemical performance. The scanning electron microscopy images of the electrochemically treated graphite/Pb conductive substrate show that the substrate possesses a three-dimensional porous structure. The active lead is uniformly deposited on the surface of the graphite/Pb substrate, which ensures the stability of the electrode structure and avoids collapse. The cyclic voltammetry (CV) results show that PGP composite has high conductivity and contains multiple redox peaks in different potential intervals. By analysing the CV diagram, the charge–discharge voltage is set at 2.2 V, which shows that the initial specific capacity of the battery can reach 218.2 mAh/g. After 200 cycles, the capacity still reaches 191.4 mAh/g, and the capacity retention rate is 87.7%. These values indicate that the battery composed of the novel graphite/Pb composite has a high initial specific capacity and good stability.

【 授权许可】

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