TY - JOUR
T1 - A Robust Route to Co2(OH)2CO3 Ultrathin Nanosheets with Superior Lithium Storage Capability Templated by Aspartic Acid-Functionalized Graphene Oxide
AU - Zhao, Shiqiang
AU - Wang, Zewei
AU - He, Yanjie
AU - Jiang, Hongrui
AU - Harn, Yeu Wei
AU - Liu, Xueqin
AU - Su, Chenliang
AU - Jin, Huile
AU - Li, Ying
AU - Wang, Shun
AU - Shen, Qiang
AU - Lin, Zhiqun
N1 - Funding Information:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (21673131, 61728403, 51872209, and 51772219), the Natural Science Foundation of Shandong Province (ZR2016BM03), the Science and Technology Planning Project of Guangdong Province (2016B050501005), the Educational Commission of Guangdong Province (2016KCXTD006), and the Zhejiang Provincial Natural Science Foundation of China (LZ18E030001 and LZ17E020002).
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/7/12
Y1 - 2019/7/12
N2 - Two-dimensional (2D) nanomaterials are widely recognized as an important class of functional materials possessing superior electrochemical reaction kinetics. Herein, an L-aspartic acid (AA)-modified graphene oxide (GO) templating strategy is developed to in situ yield ultrathin (i.e., ≈5 nm) cobalt carbonate hydroxide (Co2(OH)2CO3) nanosheets as advanced anode materials of lithium ion batteries. Notably, the covalent tethering of AA on the GO surface renders a high density of carboxyl groups that impart effective loading of Co-containing precursors and subsequent growth into Co2(OH)2CO3 nanosheets bridging adjacent GO layers. The lasagna-like Co2(OH)2CO3-GO nanocomposites exhibit an ultrahigh lithium storage capacity of 1770 mAh g−1 after 500 cycles at 100 mA g−1. It is noteworthy that the cycled Co2(OH)2CO3 phase separates into homogeneously dispersed Co(OH)2 and CoCO3 phases with two different charge plateaus at ≈1.2 and 2.0 V, respectively, which effectively inhibit large-scale homophase coarsening of Co, Li2CO3, and LiOH. The much shortened Li+/e− transfer distance enabled by individual ultrathin Co2(OH)2CO3 nanosheet together with robust layer-by-layer assembled nanostructure of Co2(OH)2CO3-GO confers the superior electrochemical reactivity and mechanical stability. As such, the amino acid-modified GO templating strategy may represent a simple yet robust means of crafting a variety of 2D nanostructured composites of interest for energy storage applications.
AB - Two-dimensional (2D) nanomaterials are widely recognized as an important class of functional materials possessing superior electrochemical reaction kinetics. Herein, an L-aspartic acid (AA)-modified graphene oxide (GO) templating strategy is developed to in situ yield ultrathin (i.e., ≈5 nm) cobalt carbonate hydroxide (Co2(OH)2CO3) nanosheets as advanced anode materials of lithium ion batteries. Notably, the covalent tethering of AA on the GO surface renders a high density of carboxyl groups that impart effective loading of Co-containing precursors and subsequent growth into Co2(OH)2CO3 nanosheets bridging adjacent GO layers. The lasagna-like Co2(OH)2CO3-GO nanocomposites exhibit an ultrahigh lithium storage capacity of 1770 mAh g−1 after 500 cycles at 100 mA g−1. It is noteworthy that the cycled Co2(OH)2CO3 phase separates into homogeneously dispersed Co(OH)2 and CoCO3 phases with two different charge plateaus at ≈1.2 and 2.0 V, respectively, which effectively inhibit large-scale homophase coarsening of Co, Li2CO3, and LiOH. The much shortened Li+/e− transfer distance enabled by individual ultrathin Co2(OH)2CO3 nanosheet together with robust layer-by-layer assembled nanostructure of Co2(OH)2CO3-GO confers the superior electrochemical reactivity and mechanical stability. As such, the amino acid-modified GO templating strategy may represent a simple yet robust means of crafting a variety of 2D nanostructured composites of interest for energy storage applications.
KW - amino acid-modified graphene oxide
KW - cobalt carbonate hydroxide (Co(OH)CO)
KW - lithium ion batteries
KW - templated growth
KW - ultrathin nanosheet
UR - http://www.scopus.com/inward/record.url?scp=85087317035&partnerID=8YFLogxK
U2 - 10.1002/aenm.201901093
DO - 10.1002/aenm.201901093
M3 - Article
AN - SCOPUS:85087317035
SN - 1614-6832
VL - 9
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 26
M1 - 1901093
ER -