Entropy change characteristics of LiMn0.67Fe0.33PO4 and Li4Ti5O12 electrode materials

Jalkanen, Kirsi; Vuorilehto, K.

doi:10.1016/j.jpowsour.2014.09.091

Cited by 13 publications

(9 citation statements)

References 52 publications

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“…The practical applications of a new lithium‐ion battery often require the understanding about the amount of heat generated by an individual cell, which is very critical for heat control and cooling systems of large battery packs. Jalkanen and his co‐workers have investigated the heat generation of a LiFe 0.33 Mn 0.67 PO 4 //LTO full cell and its dependence on the positive and negative electrode materials very recently . For LiFe 0.33 Mn 0.67 PO 4 electrode, the entropy change was found to follow the distinct redox reaction regions of Fe 2+ /Fe 3+ and Mn 2+ /Mn 3+ .…”

Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

“…The fabrication of full cells using LFMP‐based cathode materials has not received much attention, although previous experimental results from a series of studies have demonstrated the high capacities, the improved cyclic and rate performances of LFMP‐based composites generated by many strategies. Some examples on studying the full cells have been reported in recent years.…”

Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

“…Some examples on studying the full cells have been reported in recent years. Optimized spinel anode, Li 4 Ti 5 O 12 (LTO), which has received enormous attention, has been combined with a LiFe 1‐ y Mn y PO 4 /C‐based cathode to fabricate a full cell with improved electrochemical performance . The use of a LiFe 1‐ y Mn y PO 4 /C‐based cathode can avoid the decomposition of electrolyte solutions based on alkyl carbonate solvents at too high of a voltage.…”

Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

“…The replacement of a commercial LiFePO 4 /C cathode with a LiFe 1‐ y Mn y PO 4 /C cathode in a full cell is believed to lead to significantly enhancing its energy density and to provide comparable safety, rate capability, and cycling stability. Some researchers have attempted to construct full cells using LiFe 1‐ y Mn y PO 4 /C as cathodes with some magnificent achievements as discussed in Section . Research continues to develop an anode with high specific capacity and low potential with Li/Li + (e.g., Si/C and Sn/C) to match the LiFe 1‐ y Mn y PO 4 cathode.…”

Section: Critical Challengesmentioning

confidence: 99%

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Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Deng

Yang

Zou

et al. 2017

Advanced Energy Materials

112

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LiMnPO 4 (LMP) is one of the most potential candidates for high energy density (≈700 W h kg -1 ) lithium ion batteries (LIBs). However, the intrinsically low electronic conductivity and lithium ion diffusion coefficient of LMP result in its low performance. To overcome these challenges, it is an effective approach to prepare nanometer-sized Fe-doping LMP (LFMP) materials through optimization of the preparation routes. Moreover, surface coating can improve the ionic and electronic conductivity, and decrease the interfacial side reactions between the nanometer particles and electrolyte. Thus, a uniform surface coating will lead to a significant enhancement of the electrochemical performance of LFMP. Currently, considerable efforts have been devoted to improving the electrochemical performance of LiFe 1-y Mn y PO 4 (0.5 ≤ y < 1.0) and some important progresses have been achieved. Here, a general overview of the structural features, typical electrochemical behavior, delithiation/ lithiation mechanisms, and thermodynamic properties of LiFe 1-y Mn y PO 4based materials is presented. The recent developments achieved in improvement of the electrochemical performances of LiFe 1-y Mn y PO 4 -based materials are summarized, including selecting the synthetic methods, nanostructuring, surface coating, optimizing Fe/Mn ratios and particle morphologies, cation/ anion doping, and rational designing of LFMP-based full cells. Finally, the critical issues at present and future development of LiFe 1-y Mn y PO 4 -based materials are discussed.of LIBs. [3,4] Investigation on the design and preparation of high performance cathode materials has received extensive attention from academic and industrial research worldwide. The first successful example of LiCoO 2 discovered by Goodenough and his co-workers in 1980 is a dominating cathode material in commercial portable electronic devices. [5] It displays medium specific capacity and high compaction density when it is employed as a cathode material in the fabrication of electrode, resulting in its high energy density. In order to improve the safety of LIBs, decrease the cost and to enhance specific capacity, researchers have been trying to find other efficient materials. Many oxide-based positive insertion materials, such as LiMn 2 O 4 , [6] LiMn 1.5 Ni 0.5 O 4 , [7] LiNi 0.8 Co 0.15 Al 0.05 O 2 [8]and LiMn 0.33 Co 0.33 Ni 0.33 O 2[9] were proposed as possible alternatives to the existing layered LiCoO 2 cathodes because of its own shortcomings, such as the toxicity and high cost of cobalt as well as its poor thermal stability. [10] Figure 1 illustrates crystal structures and discharge curves for some typical cathode materials, including layered LiCoO , spinel LiNi 0.5 Mn 1.5 O 4 and olivine LiFePO 4 , in which spinel and olivine materials show flat potential plateaus, while layered materials display sloping potential profiles. [11] Besides the transition metal oxides-based cathode materials, phospho-olivines introduced firstly by Goodenough and co-workers in 1997 as cathode materials for L...

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Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

Section: Full Cells Based On Lfmp‐based Cathode Materialsmentioning

confidence: 99%

Section: Critical Challengesmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Deng

Yang

Zou

et al. 2017

Advanced Energy Materials

112

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“…The enthalpy change ΔH is the reaction heat of the electrochemical reaction. These three parameters can be measured by electrochemical tests and eqs 1−320…”

mentioning

confidence: 99%

Entropy Change Characteristics of the LiNi_0.5Mn_1.5O₄ Cathode Material for Lithium-Ion Batteries

et al. 2020

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Lithium-ion batteries are widely used in the field of new energy vehicles and energy storage. Understanding the electrode reaction of lithium-ion batteries is the key to improve their cycle life and safety. Direct measurement of thermodynamic data of the electrode reaction is a practical, economical, and nondestructive method for electrode characterization. In this paper, the open-circuit voltage of the LiNi 0.5 Mn 1.5 O 4 /Li half-cell is measured at different discharge states and different temperatures. The dE/ dT−SOD (state of discharge) relation curves are fitted linearly by the least square method, and the entropy change values of different SODs are calculated. Finally, the Gibbs free energy and enthalpy change of different SODs are obtained. The electrode reaction of LiNi 0.5 Mn 1.5 O 4 in different SODs was discussed by the entropy change in different SODs. According to the evolution trend of ΔS, the lithium intercalation reaction of LiNi 0.5 Mn 1.5 O 4 may be a single-phase solid solution reaction rather than a twophase reaction. Finally, the reversible heat generation at different current values and SODs are calculated.

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Research on the Reversible and Irreversible Heat Generation of LiNi1−x−yCoxMnyO2-Based Lithium-Ion Batteries

et al. 2022

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Entropy change characteristics of LiMn0.67Fe0.33PO4 and Li4Ti5O12 electrode materials

Cited by 13 publications

References 52 publications

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Entropy Change Characteristics of the LiNi_0.5Mn_1.5O₄ Cathode Material for Lithium-Ion Batteries

Research on the Reversible and Irreversible Heat Generation of LiNi1−x−yCoxMnyO2-Based Lithium-Ion Batteries

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Entropy change characteristics of LiMn0.67Fe0.33PO4 and Li4Ti5O12 electrode materials

Cited by 13 publications

References 52 publications

Recent Advances of Mn‐Rich LiFe1‐yMnyPO4 (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe1‐yMnyPO4 (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Entropy Change Characteristics of the LiNi0.5Mn1.5O4 Cathode Material for Lithium-Ion Batteries

Research on the Reversible and Irreversible Heat Generation of LiNi1−x−yCoxMnyO2-Based Lithium-Ion Batteries

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Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Entropy Change Characteristics of the LiNi_0.5Mn_1.5O₄ Cathode Material for Lithium-Ion Batteries