2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining
| Editors: | Kongoli F, Kumar V, Aifantis K, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 220 pages |
| ISBN: | 978-1-987820-54-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Optimum content of VULCAN 72 for negative plate of VRLA under HRPSoC duty
Junxiong Wang1; Jiakuan Yang1; Yuchen Hu1; Mingyang Li1; Wenhao Yu1;1HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY (HUST), Wuhan, China;
Type of Paper: Regular
Id Paper: 391
Topic: 14
Abstract:
HEVs application has brought a novel and drastic challenge to current secondary batteries, namely, High Rate Partial State of Charge (HRPSoC). Under HRPSoC duty, conventional Valve Regulated Lead-Acid Battery (VRLA) suffered from an inevitable and irreversible sulfation, leading to a premature failure. To prolong the HRPSoC cycle performance of VRLA, carbon additives incorporated into a negative active material (NAM) have been proven an effective strategy to impede progressive sulfation. In this paper, serial concentrations (from 0% to 1.8%) of VULCAN 72, an accessible and cost-effective carbon additive, was introduced into NAM of VRLA.The consequence of initial capacity at various current density and HRPSoC cycle demonstrated that a relatively low fraction of VULCAN 72 in NAM, as many authoritative experts used to suggest, not exceed 0.5%, can slightly promote both initial capacity and HRPSoC cycle performance. However, a greater concentration of VULCAN 72, about 1.2%, accomplished five times longer HRPSoC cycle life with subtle decreased initial capacity. The microstructure of negative plate has been modified with well-shaped spherical VULCAN 72 particles performing as the skeleton, nonconducting large scale lead sulfate bulk has been partially eliminated. Thus, porous and spherical microstructure was constructed, which could provide enhanced resistance to irreversible sulfation and improve charge acceptance further. Based on this research, a rather high VULCAN 72 content, approximately 1.2%, is the optimum content of VULCAN 72 for a negative plate of VRLA under HRPSoC duty.