MOF-derived Se doped MnS/Ti3C2Tx as cathode and Zn-Ti3C2Tx membrane as anode for rocking-chair zinc-ion battery

Improved electrochemical performance of the FeOx(OH)/IF electrode via in situ surface modification with organic naphthoquinone molecules

“…Significantly, the as-assembled Ni–Fe device in the present work shows the highest energy density of 235.2 W h kg −1 (19.6 W h cm −3 ) at a power density of 540.7 W kg −1 (45 W cm −3 ) and still retains a high power density of 5.4 kW kg −1 (450 W cm −3 ) at an ultrahigh energy density of 82 W h kg −1 (6.8 W h cm −3 ). The values are comparative to those of the previously reported aqueous energy storage devices, 55,56 such as GF/CNTs/Ni(OH) 2 //GF/CNTs/–Fe 2 O 3 , 57 p-MG//p-FG, 58 NiCo 2 O 4 /NiO//Fe 2 O 3 , 59 NiNTAS@Fe 2 O 3 //NiNTAS@MnO 2 , 60 MoO 3 @CNT//MnO 2 @CNT, 61 Ni 0.1 Co 0.9 Se 2 @NF//rGO@NF 62 and are even comparable to some of the aqueous Ni–Fe batteries (see Table S2, ESI†), such as Ni(OH) 2 MSs@NF//Fe 2 O 3 @GH battery (203 W h kg −1 at 0.798 kW kg −1 ), 47 NiO@C//Fe@C (138 W h kg −1 at 0.61 kW kg −1 ), 63 Ni–Co DH/OG//Fe 3 O 4 /FeOOH/OG (161.3 W h kg −1 at 5.7 kW kg −1 ), 64 and Ni@CMFs//Fe@CMFs (116 W h kg −1 at 5.76 kW kg −1 ). 65 The device also shows a good cycling stability of 81.2% (Fig.…”

Theoretical design of dendrite-free zinc anode through intrinsic descriptors from symbolic regression

“…To ensure the conductivity of the doping surfaces, the metal elements were selected as dopant atoms. Then, the elements (Al [25] , Ag [27] , In [29] , Sn [26] , Au [53] , Hg [28] , and Bi [22] ), which are reported in the existing literature to inhibit the zinc dendrite growth, were chosen. Moreover, those near these reported elements were also considered.…”

“…These findings demonstrate that doping the surfaces with Al, Ag, Cd, In, Sn, Au, Hg, Tl, and Bi can effectively inhibit dendrite growth. Among these elements, Al, Ag, In, Sn, Au, Hg, and Bi have been proven experimentally that these elements can induce uniform zinc deposition [21,22,[26][27][28][29]57] . And the Bi-doped-surface [22] with the minimum adsorption energy of zinc atom may have the best zinc dendrite-inhibiting effect.…”

“…For the former, Polyethylene glycol [21] in organic additives and inorganic salts (Bi 3+ [22] and Pd 2+ [23] ) in polar additives have been used to regulate the surface current distribution of electrodes, achieving the goal of inhibiting the zinc dendrite growth. Another method is modifying the anode electrode surface by doped heteroatom [8] , including Al [24,25] , Sn [26] , Ag [27] , Hg [28] , and In [29] , which can provide a large number of nucleation sites to induce uniform deposition [30,31] or reduce the energy consumption of ion desolvation and the energy barrier for zinc nucleus [22,32,33] . Especially on the In-doped surface, zinc atoms tend to deposit around the In area, which inhibits zinc deposition, and may even form porous structures, increasing the tolerance of zinc dendrites.…”

ZIF-67-derived Se-doped CoSe2 grown on carbon nanofibers as oxygen electrocatalysts for rechargeable Zn–air batteries

“…Owing to its unique properties, such as high conductivity, hydrophilicity, surface functional group enrichment and stability, it is becoming a new candidate for catalyst carriers. 31,32 Moreover, Zeolitic Imidazolate Framework-67 (ZIF-67) can play a crucial role in producing uniform electrocatalysts for ZABs. Tang et al synthesized carbon-coated CoSe 2 nanospheres brided by CNT (CoSe 2 @C/CNTs) using ZIF-67 particles as a template.…”