Recent advances of electrode materials based on nickel foam current collector for lithium-based batteries – A review

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 600, P. 234275 - 234275

Published: March 4, 2024

Language: Английский

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Multiscale Micro‐Nano Hierarchical Porous Germanium with Self‐Adaptive Stress Dispersion for Highly Robust Lithium‐Ion Batteries Anode

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(13)

Published: Feb. 6, 2024

Abstract The manipulation of stress in high‐capacity microscale alloying anode materials, which undergo significant volumetric variation during cycling, is crucial prerequisite for improved their cycling capability. In this work, an innovative structural design strategy proposed scalable fabrication a unique 3D highly porous micro structured germanium (Ge) featuring micro‐nano hierarchical architecture as viable high‐performance lithium‐ion batteries (LIBs). resultant micro‐sized Ge, consisting interconnected nanoligaments and bicontinuous nanopores, endowed with high activity, decreased Li + diffusion distance alleviated volume variation, appealing ideal platform in‐depth understanding the relationship between evolution. Such Ge being delivers record initial Coulombic efficiency 92.5%, large capacity 2,421 mAh cm −3 at 1.2 mA −2 , exceptional rate capability (805.6 g −1 10 Ag ) stability (over 90% retention after 1000 cycles even 5 A ), largely outperforming reported Ge‐based anodes LIBs. Furthermore, its underlying storage mechanism dispersion behavior are explicitly revealed by combined substantial situ/ex situ experimental characterizations theoretical computation. This work provides novel insights into rational durable toward high‐energy

Language: Английский

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Crack‐Resistant Si‐C Hybrid Microspheres for High‐Performance Lithium‐Ion Battery Anodes

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 1, 2024

Abstract To effectively solve the challenges of rapid capacity decay and electrode crushing silicon‐carbon (Si‐C) anodes, it is crucial to carefully optimize structure Si‐C active materials enhance their electron/ion transport dynamic in electrode. Herein, a unique hybrid microsphere Si/C/CNTs/Cu with surface wrinkles prepared through simple ultrasonic atomization pyrolysis calcination method. Low‐cost nanoscale Si waste embedded into carbon matrix, cleverly combined flexible electrical conductivity nanotubes (CNTs) copper (Cu) particles, enhancing both crack resistance kinetics entire material. Remarkably, as lithium‐ion battery anode, fabricated exhibits stable cycling for up 2300 cycles even at current 2.0 A g −1 , retaining ≈700 mAh retention rate 100% compared started . Additionally, when paired an NCM523 cathode, full cell 135 after 100 1.0 C. Therefore, this synthesis strategy provides insights design long‐life, practical anode micro/nano‐spherical structures.

Language: Английский

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High‐Performance Polyimide Covalent Organic Frameworks for Lithium‐Ion Batteries: Exceptional Stability and Capacity Retention at High Current Densities

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Organic polymers are considered promising candidates for next-generation green electrode materials in lithium-ion batteries (LIBs). However, achieving long cycling stability and capacity retention at high current densities remains a significant challenge due to weak structural low conductivity. In this study, we report the synthesis of two novel polyimide covalent organic frameworks (PI-COFs), COF-JLU85 COF-JLU86, by combining truxenone-based triamine linear acid anhydride through polymerization. These PI-COFs feature layers with pore channels embedded 18 carbonyl groups, facilitating rapid diffusion enhancing under densities. Compared previously reported polymer materials, COF-JLU86 demonstrates excellent performance densities, an impressive specific 1161.1 mA h g

Language: Английский

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A Low-temperature Ionic Liquid System to Topochemically Synthesize Si Nanospheres for High-performance Lithium-ion Batteries

Dalton Transactions, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A low-temperature ionic liquid reduction system is used to prepare Si nanospheres, which display excellent lithium storage properties with an initial Coulombic efficiency of 82.9% and capacity retention 94.2% after 100 cycles at 0.5 g −1 .

Language: Английский

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