Electrochemistry Application — Spindle-like Ni3(HITP)2 MOFs: Synthesis and Li+ storage mechanism

4 measurement groups · 27 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Cyclic voltammetry and b-value/capacitive contribution analysis

Voltammetry

Ni3(HITP)2 electrode on copper foil · Electrode

CV at scan rates of 0.2, 0.4, 0.6, 0.8 and 1.0 mV s-1; b values from log i versus log v; capacitive contribution evaluated at 0.6 mV s-1.

Temperature: 298
Geometry: Li half-cell electrode
Context: composite electrode containing pristine Ni3(HITP)2 active material
Measurement source: 4 · Results and discussion · Fig. 4b-d

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
capacitive contribution at 0.6 mV s-1	49.65%	—	—	Text Exact Reported	4 · Results and discussion · Fig. 4d
b value at 0.1 V	b0.1V = 0.77	—	—	Figure Axis Rounded Reported	5 · Results and discussion · Fig. 4c
b value at 0.7 V	b0.7V = 0.70	—	—	Figure Axis Rounded Reported	5 · Results and discussion · Fig. 4c

Electrochemical impedance spectroscopy (EIS)

Impedance spectroscopy

Ni3(HITP)2 electrode on copper foil · Electrode

Nyquist plots after the first cycle and after the 10th cycle; Li+ diffusion coefficients calculated from Warburg relationship.

Temperature: 298
Geometry: Li half-cell electrode; electrode area reported as 1.54 cm2 for diffusion calculation
Context: cycled composite electrode
Measurement source: 5 · Results and discussion · Fig. 5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Warburg low-frequency fitted slope after tenth cycle	Slope = 50.6	—	—	Figure Axis Rounded Reported	6 · Results and discussion · Fig. 5
Warburg low-frequency fitted slope after first cycle	Slope = 37.8	—	—	Figure Axis Rounded Reported	6 · Results and discussion · Fig. 5
Li+ diffusion coefficient after tenth cycleMarked as a best value within this paper	1.93 x 10-10 cm2 s-1	—	—	Text Exact Reported	5 · Results and discussion · Fig. 5
Li+ diffusion coefficient after first cycle	1.07 x 10-10 cm2 s-1	—	—	Text Exact Reported	5 · Results and discussion · Fig. 5

Galvanostatic charge/discharge in Li half-cell

Galvanostatic cycling

Ni3(HITP)2 electrode on copper foil · Electrode

LIR 2016 coin cell with Ni3(HITP)2 composite anode, Li counter electrode, 1 M LiPF6 in EC-DMC (1:1 v:v), Celgard 2300 separator, 0.005-3.000 V vs Li+/Li, 25 C.

Temperature: 298
Atmosphere: argon glove box assembly; O2 and H2O below 0.1 ppm
Geometry: coin cell; active material loading about 2 mg cm-2
Context: composite electrode containing pristine Ni3(HITP)2 active material
Measurement source: 2 · 2.3 Electrochemical characterization · Fig. 4a,e-f; Figure S2; Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
cycling reversible capacity after 70 cycles at 50 mA g-1Marked as a best value within this paper	703 mAh g-1 at 50 mA g-1 with almost no capacity fading after 70 cycles	—	—	Text Rounded Reported	1 · Abstract · Fig. 4f
stable discharge capacity after activation	about 700 mAh g-1	—	—	Text Approximate	5 · Results and discussion · Fig. 4f
first-cycle charge capacity	1080 mAh g-1	—	—	Text Exact Reported	4 · Results and discussion · Fig. 4a
first-cycle discharge capacity	662 mAh g-1	—	—	Text Exact Reported	4 · Results and discussion · Fig. 4a
initial coulombic efficiency	61.3%	—	—	Text Exact Reported	4 · Results and discussion · Fig. 4a
long-cycling reversible capacity after 200 cycles at 1000 mA g-1	128 mAh g-1 after 200 cycles	—	—	Text Exact Reported	5 · Results and discussion · Figure S2
rate discharge capacity at 100 mA g-1	about 607 mAh g-1 at 100 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 1000 mA g-1	about 135 mAh g-1 at 1000 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 200 mA g-1	about 476 mAh g-1 at 200 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 400 mA g-1	about 320 mAh g-1 at 400 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 50 mA g-1	about 730 mAh g-1 at 50 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 600 mA g-1	about 205 mAh g-1 at 600 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
rate discharge capacity at 800 mA g-1	about 160 mAh g-1 at 800 mA g-1	—	—	Text Approximate	4 · Results and discussion · Fig. 4e
capacity recovery when current reset to 50 mA g-1	recover to 730 mAh g-1	—	—	Text Exact Reported	5 · Results and discussion · Fig. 4e
second-cycle coulombic efficiency	nearly 100%	—	—	Text Approximate	4 · Results and discussion · Fig. 4a
Figure S2 coulombic efficiency near 200 cycles at 1 A g-1	approximately 99-100% near cycle 200	—	visual estimate from right axis	Figure Axis Approximate	2 · Supplementary data · Figure S2

Supplementary Table S1 literature comparison of MOF anodes for LIBs

Ni3(HITP)2 electrode on copper foil · Electrode

Table S1 reports the authors' Ni3(HITP)2 row with voltage window vs Li+/Li, reversible capacity, and current density, plus literature comparator rows.

Geometry: Li half-cell electrode comparison table
Context: composite electrode containing pristine Ni3(HITP)2 active material; only the authors' own row is extracted as first-hand evidence.
Measurement source: 3 · Supplementary data · Table S1

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Table S1 Ni3(HITP)2 reversible capacityMarked as a best value within this paper	RC/DC = 703/50; RC is reversible capacity (mAh g-1)	—	—	SI Table Exact Reported	3 · Supplementary data · Table S1
Table S1 Ni3(HITP)2 current density for reversible capacity	RC/DC = 703/50; CD is current density (mA g-1)	—	—	SI Table Exact Reported	3 · Supplementary data · Table S1
Table S1 Ni3(HITP)2 upper cutoff potential	0.005~3 V vs Li+/Li	—	—	SI Table Exact Reported	3 · Supplementary data · Table S1
Table S1 Ni3(HITP)2 lower cutoff potential	0.005~3 V vs Li+/Li	—	—	SI Table Exact Reported	3 · Supplementary data · Table S1