Journal
ACS NANO
Volume 6, Issue 10, Pages 9068-9078Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn303228r
Keywords
graphene oxide; Al reduction; surface wettability; thermal energy storage; lithium ion battery
Categories
Funding
- National 973 and 863 Program of China [2009CB939903, 2011AA050505]
- NSF of China [11274328, 51125006, 91122034, 51121064, 51102263, 21101164, 61076062]
- NSF of Shanghai [11ZR1441900]
- STC of Shanghai [10JC1415800]
Ask authors/readers for more resources
Low-temperature aluminum (Al) reduction is first introduced to reduce graphene oxide (GO) at 100-200 degrees C in a two-zone furnace. The melted Al metal exhibits an excellent deoxygen ability to produce well-crystallized reduced graphene oxide (RGO) papers with a low O/C ratio of 0.058 (Al-RGO), compared with 0.201 in the thermally reduced one (T-RGO). The Al-RGO papers possess outstanding mechanical flexibility and extremely high electrical conductivities sheet resistance R-s similar to 1.75 Omega/sq), compared with 20.12 Omega/sq of T-RGO. More interestingly, very nice hydrophobic nature (90.5 degrees) was observed, significantly superior to the reported chemically or thermally reduced papers. These enhanced properties are attributed to the low oxygen content in the RGO papers. During the aluminum reduction, highly active H atoms from H2O reacted with melted Al promise an efficient oxygen removal. This method was also applicable to reduce graphene oxide foams, which were used in the G0/SA (stearic acid) composite as a highly thermally conductive reservoir to hold the phase change material for thermal energy storage. The Al-reduced RGO/SnS2 composites were further used in an anode material of lithium ion batteries possessing a higher specific capacity. Overall, low-temperature Al reduction is an effective method to prepare highly conductive RGO papers and related composites for flexible energy conversion and storage device applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available