Fabrication of Nanosized Layered-MnO2/Activated Carbon Composites Electrodes for High-performance Supercapacitor

The usage of thermally conductive materials is limited due to their low thermal conductivity, poorthermal stability and brittleness, particularly at high working temperatures. In this work, for the first time,lignin nanoparticles (LNPs) were utilized to enhance the thermal conductivity, stability, flame-retardancy,and flexibility of boron nitride (BN)-OH/polyvinyl alcohol (PVA) composite film, which played animportant role as reinforcements. BN-OH/PVA/LNP composite film was fabricated through vacuumfiltration in conjunction with chemical cross-linking. With the loading of LNPs at 2.5 vol%, the BN-OH/PVA/LNP composite film exhibited a higher through-plane thermal conductivity (up to 1.74 W m_x0002_1 K1)than the one without LNPs (1.65 W m1 K1). After cross-linking with glutaraldehyde (GA), the elongationof the composite at break was 132%, an increase of 267% compared with the non-crosslinked one.