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4 protocols using tetraethylene glycol dimethyl ether

1

Solubility and Electrochemical Analysis of Li-BL

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Solubility tests were conducted by dissolving a few milligrams of Li-BL in N-methyl-2-pyrrolidone (Sigma Aldrich), de-ionized water, a mixture of ethylene carbonate (Sigma Aldrich): dimethyl carbonate (Sigma Aldrich) 1 : 1 v/v, dioxolane (Sigma Aldrich), dimethoxymethane (Sigma Aldrich) and tetraethylene glycol dimethyl ether (Sigma Aldrich). Electrochemical measurements were conducted using CR2032-type coin cells (MTI) with quartz membrane (Whatman) as a separator. The electrolyte was prepared by mixing bis(trifluoromethylsulfonyl) amine lithium salt (Sigma Aldrich) in tetraethylene glycol dimethyl ether (TEGDME). Fabrication of coin cells was conducted in an argon-filled glove box. Cyclic voltammetry and electrochemical impedance spectroscopy were measured with an Autolab PGSTAT 302 N potentiostat. Galvanostatic charge–discharge tests were performed on LAND CT2001A battery tester and on an Arbin Instruments BT-2000 battery cycler.
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2

Synthesis of Metal-Organic Frameworks

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Cobalt(II) nitrate hexahydrate (Co(NO3)2·6H2O, 98+%), zinc(II) nitrate hexahydrate (Zn(NO3)2·6H2O, 98+%), 2‐methyleimidazole (2‐mim, 99%), polyvinylpyrrolidone (PVP, mol. wt 10 000), EG (99.8%, anhydrous), cobalt(II) hydroxide (95%), methanol (99.9+%), ethanol (99.5+%), poly(tetrafluoroethylene) (PTFE, 1 µm), lithium perchlorate (LiClO4, 99.99+%), and tetraethylene glycol dimethyl ether (TEGDME, 99+%) were purchased from Sigma‐Aldrich. Deionized (d.i.) water was obtained from a purifying system using UV treatment. A carbon fiber paper (CFP, T090‐20%) was purchased from Toray Co., Ltd. Ketjen Black (KB, EC 600JD) was purchased from Lion Specialty Chemicals Co., Ltd.
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3

MoS2 Powder Exfoliation

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MoS2 powder (∼6 μm)
was purchased from 2D Semiconductor, Inc. A 1.6 M n-butyl lithium solution, ethylene glycol (EG), formamide (FA), propylene
carbonate (PC), N-methyl-2-pyrrolidone (NMP), dimethyl
sulfoxide (DMSO), tetraethylene
glycol dimethyl ether (TGDE), and hexamethylphosphoramide (HMPA) were
purchased from Sigma-Aldrich. All of the chemicals were used as purchased
without any further purification.
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4

Titanium Surface Preparation Protocol

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Commercially pure grade 2 titanium was purchased as 2m rods of 10mm in diameter, which were cut into disks of 2mm disks (VDM metals, Germany). Silicon carbide grinding paper of different particle size (P400, P600, P800, P1200 and P2500) and colloidal silica suspension (Eposil M11, particle size 0.06µm) were purchased from Neurtek (Spain). Isopropanol (>99.7%), ethanol (96%) and acetone (99%) were obtained from Panreac (Germany) and used without further purification. Toluene (99.9%), tetraethylene glycol dimethyl ether (tetraglyme, 99%), PEG (M w =1000g/mol), bis(3-aminopropyl)-poly(ethylene glycol) (PEG-amine), trimethylamine, silicon tetrachloride were purchased from Sigma Aldrich (USA) and used without further purification. Phosphate buffer saline (PBS, pH=7.4, Gibco, US) is purchased as 5g tablets which are dissolved in 500mL of distilled water and autoclaved at 121ºC for 1h before using.
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