Microscopy Morphology — Construction of hierarchical nickel cobalt selenide complex hollow spheres for pseudocapacitors with enhanced performance

6 measurement groups · 8 results

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

(Ni0.33Co0.67)Se2 CHS working electrode · Electrode

SEM and EDS after cycling of the hierarchical (Ni0.33Co0.67)Se2 CHS electrode; supporting figures are in rendered SI

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
post-cycling Se decrease	Se element significantly decreases after cycling, possibly due to irreversible transformation to Ni0.33Co0.67(OH)x	—	—	Text Qualitative	8 · Supplementary data · Fig. S6
post-cycling morphology retention	hierarchical complex hollow structure is still retained after cycling	—	—	Text Qualitative	7 · Supplementary data · Fig. S5

Ni-Co-MOF solid spheres · Powder

Zeiss Supra55 SEM; as-prepared Ni-Co-MOF precursor

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
Ni/Co ratio in Ni-Co-MOF precursor feed/product description	Ni/Co ratio of 0.5	0.5 Ni/Co	—	Text Exact Reported	111 · 3. Results and discussion · Scheme 1
Ni-Co-MOF sphere diameter range	about 0.8-1.2 um	—	—	Text Range	111 · 3. Results and discussion · Fig. 1a

NiCo2O4 MHSs · Powder

Zeiss Supra55 SEM; annealed oxide intermediate

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source

hierarchical (Ni0.33Co0.67)Se2 CHSs · Powder

Zeiss Supra55 SEM; hydrothermally selenized product

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
hierarchical hollow sphere morphology	spheres constructed by numerous ultrathin nanosheets with hollow inner	—	—	Text Qualitative	111 · 3. Results and discussion · Fig. 1c,d

NiCo2O4 MHSs · Powder

FEI Tecnai G2 F20 S-Twin; NiCo2O4 MHSs

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HRTEM lattice spacing	about 0.24 nm, assigned to spinel NiCo2O4 (311)	—	—	Text Approximate	112 · 3. Results and discussion · Fig. 3c

hierarchical (Ni0.33Co0.67)Se2 CHSs · Powder

FEI Tecnai G2 F20 S-Twin; hierarchical selenide CHSs

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
HRTEM lattice spacing	about 0.26 nm, assigned to CoSe2 (210) or NiSe2 (111)	—	—	Text Approximate	112 · 3. Results and discussion · Fig. 3f
nanosheet thickness	only a few nanometers	—	—	Text Approximate	112 · 3. Results and discussion · Fig. 3e