High‐Quality Graphene Microflower Design for High‐Performance Li–S and Al‐Ion Batteries

Poor quality and insufficient productivity are two main obstacles for the practical application of graphene in electrochemical energy storage. Here, high‐quality crumpled graphene microflower (GmF) for high‐performance electrodes is designed. The GmF possesses four advantages simultaneously: highly...

Full description

Saved in:
Bibliographic Details
Published in:Advanced energy materials 2017-09, Vol.7 (17), p.n/a
Main Authors: Chen, Hao, Chen, Chen, Liu, Yingjun, Zhao, Xiaoli, Ananth, Nimrodh, Zheng, Bingna, Peng, Li, Huang, Tieqi, Gao, Weiwei, Gao, Chao
Format: Article
Language:English
Subjects:
Aluminum-ion batteries
Al‐ion batteries
Crystallization
defect‐free
Electrochemical analysis
Electrodes
Energy storage
Graphene
Graphite
high‐quality graphene microflowers
large‐scale production
lithium–sulfur batteries
Low cost
Productivity
Quality
Sulfur
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Poor quality and insufficient productivity are two main obstacles for the practical application of graphene in electrochemical energy storage. Here, high‐quality crumpled graphene microflower (GmF) for high‐performance electrodes is designed. The GmF possesses four advantages simultaneously: highly crystallized defect‐free graphene layers, low stacking degree, sub‐millimeter continuous surface, and large productivity with low cost. When utilized as carbon host for sulfur cathode, the GmF‐sulfur hybrid delivers decent areal capacities of 5.2 mAh cm−2 at 0.1 C and 3.8 mAh cm−2 at 0.5 C. When utilized as cathode of Al‐ion battery, the GmF affords a high capacity of 100 mAh g−1 with 100% capacity retention after 5000 cycles and excellent rate capability from 0.1 to 20 A g−1. This facile and large‐scale producible GmF represents a meaningful high‐quality graphene powder for practical energy storage technology. Meanwhile, this unique high‐quality graphene design provides an effective route to improve electrochemical properties of graphene‐based electrodes. Scalable high‐quality graphene microflower (GmF) is produced through facial spray drying and annealing steps, which combines the sub‐millimeter continuous highly crystallized graphene surface with mesoporous and few‐stacked structures. GmF3000 affords remarkable electrochemical properties in both Li–S and Al‐ion batteries, demonstrating great significance of high‐quality graphene design in energy storage technologies.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201700051