Carbon nanotube cnt

PVA (Mw ≈ 145 000 Da, 98% hydrolysis) was purchased from Meryer Co., Ltd. Kevlar fibers were purchased from Shanghai Branch, DuPont China Holding Co., Ltd. Potassium hydroxide (KOH, AR) and potassium chloride (KCl, AR) were purchased from Sinopharm Chemical Reagent Co., Ltd. DMSO (AR) was purchased from Shanghai Titan Scientific Co., Ltd. Zinc foil (thickness: 0.08 mm) was provided by Institute of High Purity Metal Materials. Carbon nanotube (CNT) was purchased from Nanjing XFNANO Materials Tech Co., Ltd. Carbon cloth (W1S1011, 0.41 mm thick) was supplied by CeTech Co., Ltd. All reagents were used without further purification.

Ethyl cellulose (EC, 270–330 mPa·s), cellulose acetate (CA, acetyl content = 39.8 wt%), NaOH (97%), ethanol (99.7%), hydrochloric acid (HCl, 37%), sodium chloride (NaCl, 99%), and polypyrrole (PPy) were purchased from Macklin (Shanghai, China). Acetone (>99.5%) was purchased from Sigma-Aldrich (St. Louis, MO, USA). Carbon nanotube (CNT) was purchased from XF-Nano (Nanjing, China). All materials and reagents were used without further purification. Cellulose paper (basis weight = 30 g/m²) was purchased from Henglian Co. Ltd. (Shanghai, China).