A Soft Lithiophilic Graphene Aerogel for Stable Lithium Metal Anode. (5th June 2020)
- Record Type:
- Journal Article
- Title:
- A Soft Lithiophilic Graphene Aerogel for Stable Lithium Metal Anode. (5th June 2020)
- Main Title:
- A Soft Lithiophilic Graphene Aerogel for Stable Lithium Metal Anode
- Authors:
- Yang, Tianyu
Li, Li
Wu, Feng
Chen, Renjie - Abstract:
- Abstract: The lithium metal anode is one of the most promising anodes for next‐generation high‐energy‐density batteries. However, the severe growth of Li dendrites and large volume expansion leads to rapid capacity decay and shortened lifetime, especially in high current density and high capacity. Herein, a soft 3D Au nanoparticles@graphene hybrid aerogel (AuGA) as a lithiophilic host for lithium metal anode is proposed. The large surface area and interconnected conductive pathways of the AuGA significantly decrease the local current density of the electrode, enabling uniform Li deposition. Furthermore, the 3D porous structure effectively accommodates the large volume expansion during Li plating/stripping, and the Li x Au alloy serves as a solid solution buffer layer to completely eliminate the Li nucleation over‐potential. Symmetric cells can stably cycle at 8 mA cm −2 for 8 mAh cm −2 and exhibit ultra‐long cycling: 1800 h at 2 mA cm −2 for 2 mAh cm −2, and 1200 h at 4 mA cm −2 for 4 mAh cm −2, with low over‐potential. Full cells assemble with a Cu@AuGALi anode and LiFePO4 cathode, can sustain a high rate of 8 C, and retain a high capacity of 59.6 mAh g −1 after 1100 cycles at 2 C. Abstract : A soft 3D Au nanoparticles@graphene hybrid aerogel (AuGA) is designed and fabricated. The porous structure with its large surface area significantly decreases the local current density and accommodates the large volume expansion during Li metal plating/stripping. High CoulombicAbstract: The lithium metal anode is one of the most promising anodes for next‐generation high‐energy‐density batteries. However, the severe growth of Li dendrites and large volume expansion leads to rapid capacity decay and shortened lifetime, especially in high current density and high capacity. Herein, a soft 3D Au nanoparticles@graphene hybrid aerogel (AuGA) as a lithiophilic host for lithium metal anode is proposed. The large surface area and interconnected conductive pathways of the AuGA significantly decrease the local current density of the electrode, enabling uniform Li deposition. Furthermore, the 3D porous structure effectively accommodates the large volume expansion during Li plating/stripping, and the Li x Au alloy serves as a solid solution buffer layer to completely eliminate the Li nucleation over‐potential. Symmetric cells can stably cycle at 8 mA cm −2 for 8 mAh cm −2 and exhibit ultra‐long cycling: 1800 h at 2 mA cm −2 for 2 mAh cm −2, and 1200 h at 4 mA cm −2 for 4 mAh cm −2, with low over‐potential. Full cells assemble with a Cu@AuGALi anode and LiFePO4 cathode, can sustain a high rate of 8 C, and retain a high capacity of 59.6 mAh g −1 after 1100 cycles at 2 C. Abstract : A soft 3D Au nanoparticles@graphene hybrid aerogel (AuGA) is designed and fabricated. The porous structure with its large surface area significantly decreases the local current density and accommodates the large volume expansion during Li metal plating/stripping. High Coulombic efficiency, impressive symmetric cell performance, and full cells performance are simultaneously achieved under high current conditions. … (more)
- Is Part Of:
- Advanced functional materials. Volume 30:Number 30(2020)
- Journal:
- Advanced functional materials
- Issue:
- Volume 30:Number 30(2020)
- Issue Display:
- Volume 30, Issue 30 (2020)
- Year:
- 2020
- Volume:
- 30
- Issue:
- 30
- Issue Sort Value:
- 2020-0030-0030-0000
- Page Start:
- n/a
- Page End:
- n/a
- Publication Date:
- 2020-06-05
- Subjects:
- graphene aerogel -- high current density -- lithium metal anode -- nucleation -- ultra‐long cycles
Materials -- Periodicals
Chemical vapor deposition -- Periodicals
620.11 - Journal URLs:
- http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1616-3028 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1002/adfm.202002013 ↗
- Languages:
- English
- ISSNs:
- 1616-301X
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 0696.853900
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 13693.xml