N methylpyrrolidone

BP powder was purchased from Nanjing Xianfeng Nanomaterial Technology Co., LTD. N-methylpyrrolidone (NMP) was purchased from Shanghai Maclin Biochemical Technology Co., LTD. mPEG-NH₂ was purchased from Shanghai Yiyi Biotechnology Co., LTD. Pte and dopamine hydrochloride were procured from Shanghai McLean Biochemical Technology Co., LTD. Phosphate buffer solution (PBS) was purchased from Shenggong Bioengineering (Shanghai) Co., LTD. CY5.5-PEG-NH₂ was purchased from Guangzhou Carbonwater Technology Co., LTD. Saline was purchased from Sichuan Kelun Pharmaceutical Co., LTD. Triphenyltetrazolium chloride (TTC) was acquired from Beijing Solaibao Technology Co., LTD. Beijing Langeco Technology Co., LTD supplied 4% paraformaldehyde. DMEM, CCK8 assay kit, and H&E staining kit were respectively purchased from Gibco, Invigentech, and Beijing Solaibao Technology Co., LTD.

N,N-dimethylformamide (DMF), acetic acid and methanol were purchased from Chengdu Cologne Chemical Co., Ltd. (Chengdu, China). Terephthalic acid, FeCl₃∙6H₂O, phthalic anhydride, dichloromethane and N-methylpyrrolidone (NMP) were supplied by Macklin Biochemical Co., Ltd. (Shanghai, China). Chitosan (80–95% degree of deacetylation), chlorosulfonic acid and polyethersulfone (PES, molecular weight was about 50,000) were provided by Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China). All reagents and solvents were analytical grade. All the solutions were prepared using pure water.

2-methylimidazole, with purity of 98%, was purchased from Shanghai Yien Chemical Company, Shanghai, China. Cobalt chloride hexahydrate (with purity of 98%) was supplied by Sigma Aldrich, Shanghai, China. Polyvinylpyrrolidone, methanol, concentrated sulfuric acid and methyl tert-butyl ether were from Tianjin Kemio Chemical Reagent Company, Tianjin, China. N-methylpyrrolidone (purity 99%) was supplied by Shanghai Macklin Biochemical Technology Company, Shanghai, China. Poly (aryl ether sulfone) was from Jiangsu Xuzhou Engineering Plastics Factory, Xuzhou, China. Deionized water was made in the laboratory.

Zirconium (IV) chloride (ZrCl₄, 99.9%), 1,3,5-benzenetricarboxylic acid (BTC, 98.0%) were purchased from Aladdin. Aluminum (III) nitrate nonahydrate (Al(NO₃)₃·9H₂O, 99.0%), Cupric (II) nitrate trihydrate (Cu(NO₃)₂·3H₂O, 99.0%), terephthalic acid (99.0%), acetic acid (99.8%), dimethylformamide (DMF, 99.5%), methanol (99.5%), ethanol (AR), nitric acid (HNO₃, 65%), and silver nitrate (AR) were purchased from Sinopharm Chemical reagent. Sodium dodecyl sulfate (99.0%) was purchased from Innochem. Polybenzimidazoles (98.0%) and N-methylpyrrolidone (NMP, 99.5%) were purchased from Macklin Biochemical.

Poly(ether sulfone) (PES, Ultrason E6020, Mw = 58,000) samples were obtained from BASF, Shanghai, China. N-Methyl pyrrolidone (NMP, 98%) and potassium persulfate (KPS) were purchased from Macklin Biochemical Co., Shanghai, China. Poly(ethylene glycol) methacrylate (OEGMA₄₇₅, Mn = 475, 98%) and bovine serum albumin (BSA, Biotech grade, 96%) were purchased from Aladdin Chemical Ltd., Shanghai, China. 2-(2-methoxyethoxy) ethyl methacrylate (MEO₂MA, 99%) was purchased from J&K Chemical Ltd., Shanghai, China. N, N-methylene-bis-acrylamide (BIS, 96%) was purchased from Thermo Fisher Scientific, Shanghai, China. All chemicals were used as received. Ultrapure water was created in a laboratory.

TaN and N-methylpyrrolidone (NMP) were purchased from Macklin Reagent (Shanghai, China). PVP was bought from Sigma-Aldrich (St. Louis, MO, USA). Thiazolyl blue (MTT) was acquired from J&K Chemicals (Shanghai, China). The kit of Calcein-AM and Propidium iodide (PI) was bought from Solarbio Life Sciences (Beijing, China). Ultrapure water was obtained from a Milli-Q water purification system (Millipore, Burlington, MA, USA) with a resistivity of 18.2 MΩ/cm.

The CR2025 coin cell was assembled using LiFePO₄ (≥99.5%, Maclean) cathode, Li anode and PLLG composite solid electrolyte. The LiFePO₄ cathode was prepared by dissolving 80% LiFePO₄ (≥99.5%, Macklin), 10% PVDF and 10% C (≥99.5%, Aladdin, Shanghai, China) in N-methyl pyrrolidone (NMP, AR, ≥99.5%, Macklin, Shanghai, China) solvent. After stirring for 6 h, the slurry was evenly poured onto aluminum foil. Subsequently, the aluminum foil was vacuum-dried at 60 °C for 18 h then cut into circular pole pieces with a diameter of 16 mm. The active material mass of the LiFePO₄ positive electrode is 2.5–3 mg.