Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: Zn-Cu 3 (HHTP) 2 chemistry. a Schematic illustration of the rechargeable Zn-2D MOF cell. b Structure of Cu 3 (HHTP) 2 , which when viewed down the c axis, exhibits slipped-parallel stacking of 2D sheets with a honeycomb lattice. The cyan, red, and gray spheres represent Cu, O, and C atoms, respectively. The H atoms are omitted for the sake of clarity. c Expected redox process in the coordination unit of Cu 3 (HHTP) 2

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques:

Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: 2D Chemical structure and structural analysis of Cu 3 (HHTP) 2 . a Rietveld refinement of PXRD patterns. b FE-SEM image of Cu 3 (HHTP) 2 , scale bar: 200 nm. c LD-HRTEM image of Cu 3 (HHTP) 2 at a low resolution, scale bar: 20 nm. d LD-HRTEM image of Cu 3 (HHTP) 2 along the [001] zone axis, indicating a hexagonal pore packing with d 100 = 2.0 nm, scale bar: 2 nm. e – g LD-HRTEM images at ( e ) low and ( g ) high resolution along the [010] direction. Scale bars in ( e ) and ( g ) are 50 and 2 nm, respectively. f An FFT pattern of the yellow square in ( e ), scale bar: 2 nm −1

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques:

Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: Electrochemical performance of Cu 3 (HHTP) 2 . a , b Discharge–charge voltage profiles of Cu 3 (HHTP) 2 at a 50 mA g −1 and b various current densities. The green dots labeled with (a–e) in ( a ) are states where XPS analysis in Fig. b, was conducted. , d Cycling performance of Cu 3 (HHTP) 2 at current densities of 500 mA g −1 and d 4000 mA g −1

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques: Labeling

Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: Electronic states analysis during discharge–charge. a – c Ex situ XPS spectra of a Zn 2 p , b O 1 s , and c Cu 2 p . d Changes of electron density upon the reduction of Cu 3 (HHTP) 2

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques: Ex Situ

Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: Structure analysis during discharge–charge. a PXRD patterns of the Cu 3 (HHTP) 2 electrode in the pristine, first fully discharged/charged states at a rate of 50 mA g −1 , and 500th fully charged states at a rate of 4000 mA g −1 . b Scanning transmission electron microscopy (STEM) image of the fully discharged Cu 3 (HHTP) 2 alongside its EDX elemental mapping with respect to C, Cu, O, and Zn, suggesting uniform Zn insertion over the electrode, scale bar: 100 nm. c An LD-HRTEM image of discharged Cu 3 (HHTP) 2 viewed down the [010] zone axis. An inset in ( c ) shows a magnified area depicting the (100) plane, scale bar: 20 nm. d Measurements of the (100) interplanar distances from the white boxed area in ( c ) indicate the average d 100 = 1.87 nm. e , f SAD patterns from Cu 3 (HHTP) 2 at ( e ) pristine and ( f ) discharged states used to confirm the interplanar distances of (100). The arrows and scale bar indicate the [100] direction and 2 nm − 1 , respectively

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques: Transmission Assay, Electron Microscopy

Journal: Nature Communications

Article Title: Conductive 2D metal-organic framework for high-performance cathodes in aqueous rechargeable zinc batteries

doi: 10.1038/s41467-019-12857-4

Figure Lengend Snippet: Charge-storage mechanism of Cu 3 (HHTP) 2 . a Cyclic voltammograms of Cu 3 (HHTP) 2 recorded at different scan rates. b b -values for the Cu 3 (HHTP) 2 electrodes plotted as a function of the potential for cathodic scans. c Capacitive and diffusion currents contributed to the charge-storage of Cu 3 (HHTP) 2 at the rate of 0.5 mV s −1 . d A self-discharge profile of Cu 3 (HHTP) 2 . The inset shows voltage profiles for the self-discharge test before and after storage

Article Snippet: CV was carried out using coin cells with a two-electrode configuration, which comprise the Cu 3 (HHTP) 2 cathode and the Zn-film anode (Reference 600 potentiostat, Gamry Instruments, USA).

Techniques: Diffusion-based Assay