Ultrathin Co3O4 nanosheets highly dispersed on reduced graphene oxide: An efficient bi-functional catalyst for Li-O2 battery

被引：7

作者：

Song, Zhonghai ^{[1
,2
]}

Cao, Ning ^{[1
,2
]}

Gao, Xuejiao ^{[1
,2
]}

Liang, Qiu ^{[1
,2
]}

Qin, Xue ^{[1
,2
,3
]}

机构：

[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China

[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

[3] Nankai Univ, Coll Chem, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin, Peoples R China

来源：

FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES | 2017年 / 25卷 / 02期

关键词：

reduced graphene oxide; mesoporous Co3O4 nanosheets; synergistic effect; Li-O-2; batteries; AIR BATTERIES; LITHIUM; PERFORMANCE; CATHODE;

D O I：

10.1080/1536383X.2016.1253562

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ultrathin Co3O4 nanosheets grown on the reduced graphene oxide (Co3O4/rGO) was synthesized by a simple hydrothermal method and was investigated as a cathode in a Li-O-2 battery. Benefited from the synergistic effect between Co3O4 and rGO, the hybrid exhibits a high initial capacity of 10,528 mAh g(-1) along with a high coulombic efficiency (84.4%) at 100 mA g(-1). In addition, the batteries show an enhanced cycling stability and after 113 cycles, the cut-off discharge voltage remains above 2.5 V. The outstanding performance is intimately related to the high surface area of rGO, which not only provide carbon skeleton for the uniform distribution of Co3O4 nanosheets but also facilitate the reversible formation and decomposition of insoluble Li2O2. The results of electrochemical tests confirm that the Co3O4/rGO hybrid is a promising candidate for the Li-O-2 batteries.

引用

页码：65 / 70

页数：6

共 29 条

[1] A polymer electrolyte-based rechargeable lithium/oxygen battery [J].