Tincone-New Hybrid Organic-Inorganic Anode Material for High Performance Li-Ion Battery

Abstract

Atomic layer deposition (ALD) is a nanomaterial synthesis method that draws more and more attention in the past few decades. Due to its self-limit growth nature, ALD has become a powerful tool for fabricating uniform and conformal thin film[1]. Molecular layer deposition (MLD), as a derivative of ALD, is a technique specially for organic or organic-inorganic hybrid films. Due to the carbon chains were involved [2], MLD thin film shows several more merits than ALD such as low growth temperature, flexibility and low density, which are very meaningful when applied in battery material. Studies of MLD film in battery field are usually focus on the following aspects. For example, applying MLD film as a post-treatment for electrode. In this way, MLD coating can suppress electrode volume change issue during discharge/charge processes because of its flexibility. [3] Secondly, if added an annealing process, MLD film with organic component would turn into porous carbon/metal oxide matrix. The post-anneal treatment would improve the contact between active material and conductive carbon, and also bring more site for heteroatom doping [4].Although there are lots of studies of MLD film in battery field, only few researchers use MLD film as an organic electrode material. In our study, we synthesised Tincone MLD film on Nitrogen doped carbon nanotube (N-CNT), and test the electrochemical properties of this hybrid organic-inorganic anode material Tincone/N-CNT in Li-ion battery. As a result, Tincone film shows electrochemical activity in CV test, and good lithium storage ability in cycling test. The capacity retention of Tincone/N-CNT is 89% after 100 cycles. As a usage of MLD film for electrode material, Tincone/N-CNT enriches the ways of applying MLD method in battery field as well as energy storage area. Keywords: MLD battery；Tincone；Lithium ions battery