Effect of TiO2 Coating on Structure and Electrochemical Performance of LiNi0.6Co0.2Mn0.2O2 Cathode Material for Lithium-Ion Batteries DOI Open Access
Lin Li,

Zhongyu Li,

Zhifan Kuang

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6222 - 6222

Published: Dec. 19, 2024

High-nickel ternary LiNi0.6Co0.2Mn0.2O2 (NCM622) is a promising cathode material for lithium-ion batteries due to its high discharge-specific capacity and energy density. However, problems of NCM622 materials, such as unstable surface structure, lithium–nickel co-segregation, intergranular cracking, led decrease in the cycling performance an inability fully utilize specific capacity. Surface coating was primary approach address these problems. The effect TiO2 prepared by sol–gel method on studied, mainly including morphology, cell electrochemical properties. coated with thickness about 5 nm. Compared pristine electrode, TiO2-coated electrodes improved. Among all NCM622, content 0.5% demonstrates highest retention 89.3% discharge 163.9 mAh g−1, contrast 80.9% and145 g−1 after 100 cycles at 0.3 C between 3 4.3 V. cycle life wt% electrode significantly improved cutoff voltage 4.6 enhanced materials could be attributed layer that block contact electrolyte, reducing interface side reaction inhibiting transition metal dissolution. At same time, maintained stability layered structures, thus polarization phenomenon alleviating irreversible loss process.

Language: Английский

A Skin‐Mimicked Polymer Gel Electrolyte for Stabilizing Lithium Metal Batteries DOI Open Access
Hua Li,

Lei Jing,

Guojiang Wen

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract The electrolytes for advanced lithium‐metal batteries need to simultaneously achieve high‐performances in ion‐conductivity, lithium‐ion transference number, elasticity and mechanical strength, safety etc. Gel polymer (GPEs) are promising, however, conventional GPEs find it challenging all these performances, mainly due a poor control of the liquid plasticizer inside. Here, inspired by animal skins that can perfectly overcome trade‐off between mechanics complex biofunctions via water‐encapsulation inside cellular network, is attempted design fabricate type skin‐inspired nonflammable elastic GPE (SINE‐GPE) address this challenge. To do that, an anti‐solvent induced self‐assembly (ASISA) strategy proposed porous vesicular membrane based on triblock thermoplastic polyurethane (i.e., SINE‐skeleton). Then, electrolyte encapsuled SINE‐skeleton prepare SINE‐GPE. resultant SINE‐GPE achieves not only high gel‐strength 2.0 ± 0.1 MPa, recoverable strain 90% ionic conductivity 1.2 × 10 −3 S cm −1 at RT, but also selective transport (t Li+ = 0.82). Consequently, effectively stabilize anode with smooth solid‐electrolyte‐interphase, which explained self‐massaging mechanism during lithium stripping deposition.

Language: Английский

Citations

0
Cross-linkable binder for composite silicon-graphite anodes in lithium-ion batteries DOI Creative Commons
Yitong Zhang,

Jinxin Xue,

Rui Wang

et al.

Giant, Journal Year: 2024, Volume and Issue: 19, P. 100319 - 100319

Published: July 4, 2024

Silicon (Si) is a promising substitute for graphite anode due to the high theoretical specific capacity (4200 mAh g−1). However, too large volume change exists during lithiation/delithiation process. Composite anode, prepared by mixing Si with graphite, can realize higher than and much better cycle performance anode. decay caused pulverization of particles still great challenge. Here, cross-linkable binder rich in nitrile, carboxyl hydroxyl groups designed composite silicon-graphite (Si-C) The nitrile be situ cross-linked batteries through Ritter reaction. has excellent resilience good adhesion active materials current collector. cell counterpart. Scanning electron microscopy results cycled Si-C show that suppress expansion pulverization. Moreover, investigation X-ray photoelectronic spectrum density function theory calculation demonstrate decomposition ester solvent LiPF6 on been mitigated more stable SEI film formed Our strategy cross-linking provided feasible way designing next generation silicon-based anodes longer cycling life.

Language: Английский

Citations

0
In-situ forming flame-retardant gel polymer electrolyte through Ritter reaction: An innovative strategy for enhancing the safety of lithium metal battery DOI Creative Commons

Si‐Xin Jia,

Tian‐Qi Xiang,

Zi-Han Zhang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158563 - 158563

Published: Dec. 12, 2024

Language: Английский

Citations

0
Effect of TiO2 Coating on Structure and Electrochemical Performance of LiNi0.6Co0.2Mn0.2O2 Cathode Material for Lithium-Ion Batteries DOI Open Access
Lin Li,

Zhongyu Li,

Zhifan Kuang

et al.

Materials, Journal Year: 2024, Volume and Issue: 17(24), P. 6222 - 6222

Published: Dec. 19, 2024

High-nickel ternary LiNi0.6Co0.2Mn0.2O2 (NCM622) is a promising cathode material for lithium-ion batteries due to its high discharge-specific capacity and energy density. However, problems of NCM622 materials, such as unstable surface structure, lithium–nickel co-segregation, intergranular cracking, led decrease in the cycling performance an inability fully utilize specific capacity. Surface coating was primary approach address these problems. The effect TiO2 prepared by sol–gel method on studied, mainly including morphology, cell electrochemical properties. coated with thickness about 5 nm. Compared pristine electrode, TiO2-coated electrodes improved. Among all NCM622, content 0.5% demonstrates highest retention 89.3% discharge 163.9 mAh g−1, contrast 80.9% and145 g−1 after 100 cycles at 0.3 C between 3 4.3 V. cycle life wt% electrode significantly improved cutoff voltage 4.6 enhanced materials could be attributed layer that block contact electrolyte, reducing interface side reaction inhibiting transition metal dissolution. At same time, maintained stability layered structures, thus polarization phenomenon alleviating irreversible loss process.

Language: Английский

Citations

0