Stress‐Induced Anomalous Lithiation Plateau of LiFeyMn1−yPO4 Over High‐Rate Discharging DOI Open Access

Enhao Xu,

Tuan Wang,

Jinxuan Chen

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 27, 2024

Abstract Olivine‐type LiFe y Mn 1− PO 4 (LFMP) is a promising cathode candidate with high energy density, chemical stability, and cost efficiency. However, an unidentified anomalous lithiation plateau (P II) often emerges between the 2+ /Mn 3+ Fe /Fe redox reactions, leading to decrease in density. Herein, it demonstrated that P II originates from couple, yet differs classical reaction due its lower operating voltage. During lithiation, Li + initially accumulates on particle surface, forming lithium‐rich phase, while interior remains lithium‐poor phase. As proceeds, two‐phase boundary experiences local compressive stress counteracting forces during expansion. This compresses lattice, thereby lowering voltage of inducing formation II. Such effect exacerbated by increased C‐rates higher Mn‐content. Interestingly, acts as double‐edged sword enhancing diffusion kinetics mitigating Jahn–Teller distortion, fully unlocking capacity . Furthermore, particle‐size‐reduction strategy developed address II, which decreases contribution 28.59% 7.77% at 2 C. These findings deepen understanding mechanisms LFMP offer novel insights for developing high‐power/voltage olivine‐type cathodes.

Language: Английский

Carbon-coated LiMn0.8Fe0.2PO4 cathodes for high-rate lithium-ion batteries DOI
Xi Fan Yao, Dan Li, Li Guo

et al.

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(2)

Published: March 22, 2024

Language: Английский

Citations

14
Enhancing the Mn Redox Kinetics of LiMn0.5Fe0.5PO4 Cathodes Through a Synergistic Co‐Doping with Niobium and Magnesium for Lithium‐Ion Batteries DOI
Panawan Vanaphuti, Arumugam Manthiram

Small, Journal Year: 2024, Volume and Issue: 20(47)

Published: Aug. 13, 2024

The concerns on the cost of lithium-ion batteries have created enormous interest LiFePO

Language: Английский

Citations

11
Contribution of Ti-Doping to the Cyclic Stability of LiFe0.6Mn0.4PO4/C DOI
Jing Peng, Zhen Li, Yang You

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(18), P. 8228 - 8238

Published: April 26, 2024

Li(Fe0.6Mn0.4)1–xTixPO4/C cathode materials, with x values of 0, 0.01, 0.02, 0.03, and 0.04, were fabricated through a dual-stage synthesis process, incorporating both coprecipitation high-temperature solid-phase techniques. The composition, microstructure, surface morphology these materials thoroughly characterized using suite analytical These analyses confirmed the successful doping Ti ions into olivine lattice, resulting in decrease unit cell volume formation an amorphous carbon layer on particles' surfaces, which also improved particle dispersion. electrochemical performance samples was assessed techniques including constant current charge–discharge testing, cyclic voltammetry, impedance spectroscopy. findings showed that Ti-doping markedly diminishes potential polarization strong Ti–O coordination suppresses Jahn–Teller effect Mn3+, effectively enhancing stability lithium-ion diffusion rate material. Additionally, density functional theory (DFT) calculations conducted to assess impact LFMP. reveal reduces bandgap material increases bond length Li–O, thereby further confirming can enhance electronic conductivity. Among them, Li(Fe0.6Mn0.4)1–xTixPO4/C-3%Ti exhibited best performance. optimized sample demonstrated specific discharge capacity 163.53 mAh·g–1 at 0.1C, accompanied by initial coulombic efficiency 93.18%. At 1C, it provided 140.59 mAh·g–1, sustaining retention 93.58% after 500 cycles, delivered 94.08 5C.

Language: Английский

Citations

10
LiMn0.8Fe0.2PO4/C Nanoparticles via Polystyrene Template Carburizing Enhance the Rate Capability and Capacity Reversibility of Cathode Materials DOI
Yan Wang,

Fubao Yong,

Zhihua Wang

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(4), P. 4024 - 4034

Published: Feb. 7, 2024

In order to unlock the electrochemical performance ability of manganese-based lithium ferromanganese phosphate cathode materials, CP1–LiMn0.8Fe0.2PO4/C (coprecipitation) nanocomposites were prepared by introducing polystyrene nanospheres as templates and carbon sources into coprecipitation method combined with a multistage carburizing heat treatment. processes treatment, can not only build conductive layer optimize electron transport path but also refine particles inhibit nanoparticle aggregation. The interconnected coating significantly improves diffusion coefficient ions, which assists LiMn0.8Fe0.2PO4 in lifting discharge specific capacity cycle performance. test results show that as-prepared shows superior rate capability (130.5 mAh g–1 at 0.1C 92.8 5C) reversibility (95.5% after 200 cycles 0.5C).

Language: Английский

Citations

8
Boosting both electronic and ionic conductivities via incorporation of molybdenum for LiFe0.5Mn0.5PO4 cathode in lithium-ion batteries DOI
Donguk Kim, Sunwoo Lee, Wonchang Choi

et al.

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 989, P. 174396 - 174396

Published: April 4, 2024

Language: Английский

Citations

7
Improved Electrochemical Performance of LiMn0.6Fe0.4PO4 via Chitosan‐Derived Nitrogen‐Doped Carbon Coating DOI

Jiawang Zhang,

Youming Liu,

Baofeng Wang

et al.

Batteries & Supercaps, Journal Year: 2024, Volume and Issue: 7(7)

Published: April 15, 2024

Abstract The olivine‐type compound LiMn x Fe 1‐X PO 4 (LMFP) combines the advantageous characteristics of LiFePO and LiMnPO , including high energy density, extended cycle life, eco‐friendliness, cost‐effectiveness. However, its application is limited by certain challenges such as low electronic conductivity stability issues related to Jahn‐Teller effect induced Mn 3+ which hinder scalability. Here, we introduce an innovative approach applying nitrogen‐doped carbon layers, derived from chitosan both a nitrogen sources, encapsulate LMFP. This encapsulation significantly improves LMFP′s electrochemical performance compared those using sucrose‐derived coatings. LMFP cathode with coating exhibits specific capacity 156.8 mAh/g at 0.1 C, achieved first‐cycle Coulombic efficiency 96.8 %, maintained retention rate 94.6 % after 200 cycles 1 C. new method employing for producing coatings holds great promise enhancing usability in broader applications.

Language: Английский

Citations

5
Optimizing the Electrochemical Performance of Olivine LiMnxFe1–xPO4 Cathode Materials: Ongoing Progresses and Challenges DOI

Enhao Xu,

Xiaobo Sun,

Wei Lyv

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(22), P. 9631 - 9660

Published: May 23, 2024

LiMnxFe1–xPO4 is the most promising olivine-type cathode material following LiFePO4 in terms of development potential. However, several technological challenges remain its widespread application, particularly low electronic conductivity, slow Li+ diffusion rate, and undetermined optimal Mn/Fe ratio. To date, enormous efforts have been devoted to addressing intrinsic defects facilitate electrochemical kinetics, some companies launched first-generation LiMnxFe1–xPO4. In this review, structural characteristics, lithium storage mechanism, synthesis methods are first introduced. Wherein, a particular emphasis placed on rational design precursors with tunable composition tailored architecture, encompassing Mn–Fe binary Mn–Fe–P ternary precursors. Then, up-to-date optimization strategies for improving performance LiMnxFe1–xPO4, such as ratio optimizing, conductive compositing, element doping, morphology controlling discussed comprehensively, special focus regulation additional discharge plateau, which not only prevents decrease energy density but also maintains consistency batteries. Finally, critical issues, existing challenges, new research directions, perspectives further commercialization discussed.

Language: Английский

Citations

5
Providing high stability to suppress metal dissolution in LiMn0.5Fe0.5PO4 cathode materials by Zn doping DOI

Byeong Jin Jeong,

Jae Yoon Sung,

Feng Jiang

et al.

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 96, P. 112552 - 112552

Published: June 22, 2024

Language: Английский

Citations

5
Multivalent Cation Incorporated into Manganese‐Iron Based NASICON Cathodes for High Voltage Sodium‐Ion Batteries DOI Open Access

Jingyao Zeng,

Jinqiang Gao,

Weishun Jian

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 9, 2024

Abstract Na 4 Mn 1.5 Fe (PO ) 2 P O 7 (NMFPP), with its low cost and high energy density, is essential for accelerating the commercialization of sodium‐ion batteries. However, practical application limited by serious voltage hysteresis detrimental Jahn‐Teller distortions. Herein, a operating superior stable Nb‐doped NMFPP fewer intrinsic anti‐site defects are elaborately designed reconstruction crystal lattice electronic distribution. By introducing higher charge density Nb─O bonds, lengths Mn‐O bonds shortened, enhancing stability. As result, volume contracted during + extraction/insertion decreased niobium‐modified (Mn 0.5 2.94 Nb 0.06 , mitigating distortion from effect increasing capacity retention after 1000 cycles 57.5% to 82.3%. More importantly, delayed 2+ involvement in redox reactions significantly reduced, raising average 3.32 3.64 V overall 13%. This study opens new avenues develop advanced battery cathode materials long calendar life storage.

Language: Английский

Citations

5
Relaxing the Jahn–Teller distortion of LiMn0.6Fe0.4PO4 cathodes via Mg/Ni dual-doping for high-rate and long-life Li-ion batteries DOI
Haifeng Yu,

Erdong Zhang,

Jinxun Yu

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(38), P. 26076 - 26082

Published: Jan. 1, 2024

The synergistic doping of divalent Mg 2+ and Ni ions into a carbon-coated LiMn 0.6 Fe 0.4 PO 4 cathode significantly enhances reaction kinetics structural stability by mitigating the Jahn–Teller effect accelerating Li-ion migration rate.

Language: Английский

Citations

4