Self-Pressure Silicon–Carbon Anodes for Low-External-Pressure Solid-State Li-Ion Batteries DOI

Xin Qin,

Lu Zhao, Junwei Han

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Although a high stack pressure (≥50 MPa) enhances solid-solid contacts in solid-state batteries (SSBs), it poses impracticality for commercialization. This work proposes self-pressure silicon (Si)-carbon composite anode that enables stable operation under reduced external (≤2 MPa). The features prestress structure can effectively alleviate the internal and stress simultaneously, which is fabricated with ionic-conductive poly(ethylene oxide) (PEO)/lithium salt-coated carbon nanotubes (CNTs) being compressed by shrinking graphene hydrogel. capillary-driven hydrogel shrinkage generates pressure, compensating volumetric expansion (up to 300%) of Si. creates dynamic interfaces between CNTs/PEO expanding Si, ensuring both mechanical stability ion/electron transport. SSBs this have long cycle life 700 cycles capacity retention 79.2% an organic/inorganic electrolyte without (0 half-cell using sulfide reached was able achieve at lowest 2 MPa pressure. design resolves interfacial challenges SSBs.

Language: Английский

Strategies Toward Stable Anode Interface for Sulfide‐Based All‐Solid‐State Lithium Metal Batteries DOI Open Access
E.Z. Luo, Xuemei Ren, Miao He

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Abstract Sulfide‐based all‐solid‐state batteries (ASSBs) have ushered in a new era of energy storage technology, offering the tantalizing prospect unprecedented density and safety. However, poor electrode‐electrolyte interface between Li anodes sulfide solid electrolytes has hindered its practical application. In this review, primary focus lies current fundamental understanding, challenges, optimization strategies regarding chemistries anode. First, an in‐depth discussion is conducted provides detailed summary interfacial challenges that exist anode electrolytes. Among these compatibility stability stand out as two crucial issues. Subsequently, effective approaches are systematically explored to surmount These encompass component structural design bulk anode, doping coating electrolytes, Finally, insights present into limitations studies, perspectives, recommendations for further development sulfide‐based solid‐state batteries, aiming offer comprehensive enlightening overview engineering, which great significance integration applicable metal (ASSLMBs).

Language: Английский

Citations

0
Self-Pressure Silicon–Carbon Anodes for Low-External-Pressure Solid-State Li-Ion Batteries DOI

Xin Qin,

Lu Zhao, Junwei Han

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Although a high stack pressure (≥50 MPa) enhances solid-solid contacts in solid-state batteries (SSBs), it poses impracticality for commercialization. This work proposes self-pressure silicon (Si)-carbon composite anode that enables stable operation under reduced external (≤2 MPa). The features prestress structure can effectively alleviate the internal and stress simultaneously, which is fabricated with ionic-conductive poly(ethylene oxide) (PEO)/lithium salt-coated carbon nanotubes (CNTs) being compressed by shrinking graphene hydrogel. capillary-driven hydrogel shrinkage generates pressure, compensating volumetric expansion (up to 300%) of Si. creates dynamic interfaces between CNTs/PEO expanding Si, ensuring both mechanical stability ion/electron transport. SSBs this have long cycle life 700 cycles capacity retention 79.2% an organic/inorganic electrolyte without (0 half-cell using sulfide reached was able achieve at lowest 2 MPa pressure. design resolves interfacial challenges SSBs.

Language: Английский

Citations

0