Long‐Life Lead‐Acid Battery for High‐Rate Partial‐State‐of‐Charge Operation Enabled by a Rice‐Husk‐Based Activated Carbon Negative Electrode Additive. Issue 8 (26th February 2020)

• Record Type: Journal Article
• Authors: Lin, Zheqi; Zhang, Wenli; Lin, Nan; Lin, Haibo; Shi, Jun
• Is Part Of: ChemistrySelect. Volume 5:Issue 8(2020)
• Page Start: 2551
• Page End: 2558
• Publication Date: 2020-02-26
• Subjects: Rice-husk-based activated carbon -- High-rate partial-state-of-charge -- Cycling life -- External specific surface area; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201904280
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Lead sulfation severely shortens the cycling life of lead‐acid battery under high‐rate partial‐state‐of‐charge (HRPSoC) operation. Adding carbon materials into negative active mass has been demonstrated as an effective strategy to suppress the sulfation. In this paper, rice‐husk‐based activated carbon (RHAC) with high specific surface area and high pore volume exhibits excellent performances on enhancing the discharge capacity, the dynamic charge acceptance and especially the cycling life of negative electrode of lead acid battery. Results show that the HRPSoC cycling life of negative electrode with RHAC exceeds 5000 cycles which is 4.65 and 1.42 times that of blank negative electrode and negative electrode with commercial activated carbon, respectively. These outstanding performances are ascribed to the unique architectural properties of RHAC comparing with commercial activated carbon, such as three‐dimensional porous structure for acid storage, high mesopore volume for efficient ions transport and large external specific surface area for energetic Pb deposition. Abstract : The deposition of lead particles on carbon surface is a crucial progress during the charge process of a lead‐carbon binary composite electrode. This progress is promoted on RHAC surface owing to its large external specific surface area and plenty mesopores, which results in a long cycling life of lead‐carbon negative electrode operated under high‐rate partial‐state‐of‐charge duties.