Papers by Sahriani Hasibuan
Agglomerated nickel–cobalt layered double hydroxide nanosheets on reduced graphene oxide clusters as efficient asymmetric supercapacitor electrodes
Journal of Materials Research, 2020
Recently, layered double hydroxides (LDHs) have attracted intensive research interest as the next... more Recently, layered double hydroxides (LDHs) have attracted intensive research interest as the next-generation supercapacitor electrodes due to their unique two-dimensional (2D) hydrotalcite-like structure. However, the inevitable agglomeration significantly decreases the accessible surface areas and blocks the pseudocapacitive sites, thus severely hinders their electrochemical applications. Herein, we develop a facile one-step growth approach to fabricate porous agglomerate of NiCo-LDH nanosheets and reduced graphene oxide (rGO) nanoflakes. By adjusting feeding molar ratios, the obtained NiCo-LDH/rGO electrode delivers a high specific capacity of 879.5 C/g at a current density of 0.5 A/g and still remains 485 C/g at 20 A/g. Furthermore, the fabricated asymmetric supercapacitor (ASC) has demonstrated a superior energy density of 48.7 W h/kg at a power density of 401 W/kg. After 2000 cycles, the assembled ASC exhibits an improved capacity retention of 81% within a potential window of 1.6 V at 2 A/g.
Agglomerated nickel–cobalt layered double hydroxide nanosheets on reduced graphene oxide clusters as efficient asymmetric supercapacitor electrodes
Journal of Materials Research, 2020
Recently, layered double hydroxides (LDHs) have attracted intensive research interest as the next... more Recently, layered double hydroxides (LDHs) have attracted intensive research interest as the next-generation supercapacitor electrodes due to their unique two-dimensional (2D) hydrotalcite-like structure. However, the inevitable agglomeration significantly decreases the accessible surface areas and blocks the pseudocapacitive sites, thus severely hinders their electrochemical applications. Herein, we develop a facile one-step growth approach to fabricate porous agglomerate of NiCo-LDH nanosheets and reduced graphene oxide (rGO) nanoflakes. By adjusting feeding molar ratios, the obtained NiCo-LDH/rGO electrode delivers a high specific capacity of 879.5 C/g at a current density of 0.5 A/g and still remains 485 C/g at 20 A/g. Furthermore, the fabricated asymmetric supercapacitor (ASC) has demonstrated a superior energy density of 48.7 W h/kg at a power density of 401 W/kg. After 2000 cycles, the assembled ASC exhibits an improved capacity retention of 81% within a potential window of 1.6 V at 2 A/g.
Studi Multidisipliner: Jurnal Kajian Keislaman, 2019
The purpose of this study is to test the theory which is then analyzed again into a new finding. ... more The purpose of this study is to test the theory which is then analyzed again into a new finding. This type of research is quantitative with a collaborative method obtained from a questionnaire. The results of this study indicate that the pattern of parental communication (X1) towards adolescent morals (Y) has a correlation of 0.890 or 89% showing a very strong relationship. The correlation of emotional intelligence of parents (X2) with the morals of adolescents (Y) has a value of 0.926 or 92% indicating a very strong relationship. Whereas to test the significance level of F 5%, the effect of parental communication patterns on adolescent behavior shows that Fh (270,761) Ft (0,000) shows an appropriate and acceptable relationship.
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Papers by Sahriani Hasibuan