2022
DOI: 10.1007/s40843-022-2176-6
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Molecular engineering toward sustainable development of multiple-doped hierarchical porous carbons for superior zinc ion storage

Abstract: Aqueous Zn-ion hybrid supercapacitors (ZHSCs) hold great potential as next-generation energy storage devices due to their low cost, excellent rate capability, long cycling life, and high safety. Heteroatom-doped hierarchical porous carbons (HD-HPCs) with integrated high specific surface area, multiscale pores, and abundant defects have been regarded as promising cathode materials for ZHSCs. However, the in situ architecture of HD-HPCs with these multiple advantages via a sustainable and controllable method rem… Show more

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Cited by 11 publications
(4 citation statements)
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“…[ 42 ] The HC‐CA‐15% anode possesses a lowest σ value among all samples, also demonstrating superior electrochemical kinetics. [ 43 ] The electrochemical kinetics of the HC‐CA‐15% anode was also evaluated based on CV curves at different scan rates, which is discussed in the Supporting Information (Figure S23).…”
Section: Resultsmentioning
confidence: 99%
“…[ 42 ] The HC‐CA‐15% anode possesses a lowest σ value among all samples, also demonstrating superior electrochemical kinetics. [ 43 ] The electrochemical kinetics of the HC‐CA‐15% anode was also evaluated based on CV curves at different scan rates, which is discussed in the Supporting Information (Figure S23).…”
Section: Resultsmentioning
confidence: 99%
“…[1] The dendrite growth is ascribed to the inhomogeneous Zn 2+ deposition caused by the rapid yet unbalanced deposition kinetics, and the side reactions spontaneously occurred due to the high activity of Zn toward H 2 O, resulting in hydrogen evolution, [2] the corrosion of Zn metal, [3] and the formation of electrochemically inactive byproducts (e.g., Zn 4 SO 4 (OH) 6 •xH 2 O, zinc hydroxide) at the Zn/electrolyte interface. [1,4,5] Moreover, these high surface area byproducts further deteriorate the uniformity of Zn 2+ deposition due to the heterogenous interface interactions, also leading to aggravated dendrite growth, and eventually forming dead Zn. As such, these issues finally compromise the plating/stripping Coulombic efficiency (CE) of Zn anode, [6] and sensitively determine the lifespan of Zn anodes in the practical AZMBs with proper N/P ratios.…”
Section: Introductionmentioning
confidence: 99%
“…More recently, HCs with atomic Zn-doping in which zinc acetate acts as a Zn precursor also exhibit expanded graphite regions ( d 002 = 0.408 nm), contributing to a significantly improved reversible capacity . In addition, modifying the pore structure (e.g., porosity and pore size) is a potent strategy to promote sodiation kinetics since it can (1) tune the specific surface area (SSA), (2) elevate the intrinsic defect concentration that favors the adsorption behavior of Na + , and (3) serve as channels to facilitate Na + transfer . Furthermore, the plateau capacity of hard carbons can be effectively increased by a rational design of pore structure, such as closed-pore structure. For instance, ultramicropores prepared by the molten diffusion-carbonization method can offer extra Na + storage sites and serve as ionic sieves that accelerating fast diffusion of Na + during the sodiation/desodiation process .…”
Section: Introductionmentioning
confidence: 99%