Utilization of Hard Carbon As a Substitute for Graphite As Efficient Lithium Battery Anode Material
3 Pages Posted: 13 Aug 2019
Date Written: April 8, 2019
Lithium battery anode plates were made from sugar processed into hard carbon by high temperature carbonization in an autoclave. Sucrose was dissolved in water at 60 ⁰C, mixed thereafter with naphthalene. The hard carbon is purifies with HCl and distilled water. Nano-hard carbons1,2 are 3-dimensional and notably larger than the 2-dimensional graphenes3-5. Anode plates were prepared by homogenizing the sonicated graphene in PVDF saturated NMP (0.53% NMP; 4% super-P carbon black; and 2.25wt% PVDF) for 1 hr. The anode slurry was coated on the copper plates using automatic doctor blade film coater at a speed of 100mm/min. Anode plates were dried at 80 ⁰C for and cured for 120 ⁰C for 2 hrs and 24 hrs respectively, in vacuum oven. Coin cells of NMC//HC were made and tested in CT2001A. The capacity of 48 µm thick and 28.2 g/m2 anode cycled at 1C was ~49.70 mAhg-1, which is a replaceable anode material for lithium-ion batteries to 67 µm thick and 33.9 g/m2 graphite anode with a capacity of 60.62 mAhg-1.
Keywords: Anode, Capacity Utilization, Hard Carbon, Lithium Battery
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