Numerical investigation on the polarization and thermal characteristics of LiFePO4-based batteries during charging process

Ji, Hengsong; Luo, Tianbei; Dai, Liming; He, Zhixia; Wang, Qian

doi:10.1016/j.applthermaleng.2022.118709

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…EDS mapping results of SAC−21, SAC−11, and SAC−12, shown in Figure 3a-c, respectively, indicate that the sheet-like structure mainly contains C and Si, and the spherical structures mainly contain C. The uniformly distributed Al and O indicate that a layer of Al 2 O 3 was synthesized, which is also proved by the TEM image of SAC−11, shown in Figure 4. The amorphous layer without lattice fringes in the HRTEM image was believed to be a carbon shell, as carbon is in the amorphous phase, proven by XRD patterns in Figure 5 and previous studies [7,8]. The crystalline layer with a lattice fringe spacing of 0.31 nm corresponds to the (111) plane of Si, while the intermediate crystalline layer with a lattice fringe distance of 0.14 nm corresponds to the (440) plane of Al 2 O 3 .…”

Section: Materials Morphology Structure and Chemical Compositionmentioning

confidence: 51%

“…XRD patterns in Figure 5 and previous studies [7,8]. The crystalline layer with a lattice fringe spacing of 0.31 nm corresponds to the (111) plane of Si, while the intermediate crystalline layer with a lattice fringe distance of 0.14 nm corresponds to the (440) plane of Al2O3.…”

Section: Materials Morphology Structure and Chemical Compositionmentioning

confidence: 52%

“…Due to their high energy storage capacity and fast charging rates, lithium-ion batteries (LIBs) have become the dominant rechargeable batteries used [1][2][3][4]. However, current commercial lithium-ion batteries mostly use graphite anodes and cannot satisfy the growing demand for higher energy storage capacity [5][6][7][8]. Therefore, it is imperative to develop enhanced anode materials for lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

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Recycling Silicon Waste from the Photovoltaic Industry to Prepare Yolk–Shell Si@void@C Anode Materials for Lithium–Ion Batteries

Liu

et al. 2023

Processes

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Silicon is considered to have significant potential for anode materials in lithium–ion batteries (LIBs) with a theoretical specific capacity of 4200 mAh g−1. However, the development of commercial applications is impacted by the volume shift that happens in silicon when charging and discharging. In this paper, a yolk–shell–structured Si@void@C anode material has been developed to address this problem. The silicon nanoparticle yolk material is obtained by recycling kerf loss (KL) Si waste from the process of slicing silicon block casts into wafers in the photovoltaic industry; the carbon shell is prepared by a hydrothermal method with glucose, and the sacrificial interlayer is Al2O3. The produced material is employed in the production of anodes, exhibiting a reversible capacity of 836 mAh g−1 at 0.1 A g−1 after 100 cycles, accompanied by a Coulomb efficiency of 71.4%. This study demonstrates an economical way of transforming KL Si waste into materials with an enhanced value for LIBs.

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Section: Materials Morphology Structure and Chemical Compositionmentioning

confidence: 51%

Section: Materials Morphology Structure and Chemical Compositionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

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Recycling Silicon Waste from the Photovoltaic Industry to Prepare Yolk–Shell Si@void@C Anode Materials for Lithium–Ion Batteries

Liu

et al. 2023

Processes

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“…The sharp increase and decrease of the voltage plateau make the time to the cut‐off voltage shorter for cells assembled with MS‐PEO and 30LM‐MS‐PEO, and thus a more pronounced specific capacity drops for cells assembled with MS‐PEO and 30LM‐MS‐PEO (Figure S6d, Supporting Information). [ 35 ] The difference in polarization of the three PEMs is evident in the cycling curves of Li─Li symmetric cells, as shown in the embedded figure in Figure 6b. Li─Li cell with MS‐PEO deliver the similar polarization voltage of about 0.45 V during charging and discharging on a constant current.…”

Section: Resultsmentioning

confidence: 99%

Liquid Metal Loaded Molecular Sieve: Specialized Lithium Dendrite Blocking Filler for Polymeric Solid‐State Electrolyte

Qian,

Zhu,

Sun

et al. 2024

Advanced Materials

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All‐solid‐state lithium metal batteries (LMBs) are currently one of the best candidates for realizing the yearning high‐energy‐density batteries with high safety. However, even polyethylene oxide (PEO), the most popular polymeric solid‐state electrolyte (SSE) with the largest ionic conductivity in the category so far, has significant challenges due to the safety issues of lithium dendrites, and the insufficient ionic conductivity. Herein, molecular sieve (MS) was integrated into the PEO as an inert filler with the liquid metal (LM) as a functional module, forming an “LM‐MS‐PEO” composite as both SSE with enhanced ionic conductivity, and protection layer against lithium dendrites. As demonstrated by theoretical and experimental investigations, LM released from MS can be uniformly and efficiently distributed in PEO, which could avoid agglomeration, enables the effective blocking of lithium dendrites, and regulate the mass transport of Li ions, thus achieving even deposition of lithium during charge/discharge. Moreover, MS could reduce the crystallinity of PEO, improve lithium‐ion conductivity, and reduce operating temperature. Benefiting from the introduction of the functional MS/LM, the LM‐MS‐PEO electrolyte exhibits four‐fold higher lithium ionic conductivity than the pristine PEO at 40 °C, while the as‐assembled all‐solid‐state LMBs have four to five times longer stable cycle life.This article is protected by copyright. All rights reserved

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“…Ohmic, electrochemical, and concentration polarization are the three different forms of polarization [26,27]. The polarization phenomenon reduces the power density of the battery, which results in reduced energy conversion efficiency and more energy waste.…”

Section: Introductionmentioning

confidence: 99%

The Polarization and Heat Generation Characteristics of Lithium-Ion Battery with Electric–Thermal Coupled Modeling

Guo,

Liu

et al. 2023

Batteries

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This paper investigates the polarization and heat generation characteristics of batteries under different ambient temperatures and discharge rates by means of using a coupled electric–thermal model. This study found that the largest percentage of polarization is ohmic polarization, followed by concentration polarization and electrochemical polarization. The values of the three types of polarization are generally small and stable under normal-temperature environments and low discharge rates. However, they increase significantly in low-temperature environments and at high discharge rates and continue to rise during the discharge process. Additionally, ohmic heat generation and polarization generation also increase significantly under these conditions. Reversible entropy heat is less sensitive to ambient temperature but increases significantly with the increase in the discharge rate. Ohmic heat generation and polarization heat generation contribute to the total heat generation of the battery at any ambient temperature, while reversible entropy heat only contributes to the total heat generation of the battery at the end of discharge.

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Numerical investigation on the polarization and thermal characteristics of LiFePO4-based batteries during charging process

Cited by 12 publications

References 35 publications

Recycling Silicon Waste from the Photovoltaic Industry to Prepare Yolk–Shell Si@void@C Anode Materials for Lithium–Ion Batteries

Recycling Silicon Waste from the Photovoltaic Industry to Prepare Yolk–Shell Si@void@C Anode Materials for Lithium–Ion Batteries

Liquid Metal Loaded Molecular Sieve: Specialized Lithium Dendrite Blocking Filler for Polymeric Solid‐State Electrolyte

The Polarization and Heat Generation Characteristics of Lithium-Ion Battery with Electric–Thermal Coupled Modeling

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