New lithium ion batteries exploiting conversion/alloying anode and LiFe0.25Mn0.5Co0.25PO4 olivine cathode. (1st December 2016)

• Record Type: Journal Article
• Authors: Lecce, Daniele Di; Verrelli, Roberta; Hassoun, Jusef
• Is Part Of: Electrochimica acta. Volume 220(2016)
• Page Start: 384
• Page End: 390
• Publication Date: 2016-12-01
• Subjects: olivine cathode -- conversion -- alloy anode -- impedance spectroscopy -- Li-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.10.067
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: New Li-ion batteries are reported. LiFe0.25 Mn0.5 Co0.25 PO4 olivine is used as the cathode. Either Sn-C or Sn-Fe2 O3 -C composites are used as anodes. The electrode/electrolyte interfaces are monitored by EIS. The systems are considered suitable for energy storage Abstract: New Li-ion cells are formed by combining a LiFe0.25 Mn0.5 Co0.25 PO4 olivine cathode either with Sn-Fe2 O3 -C or with Sn-C composite anodes. These active materials exhibit electrochemical properties very attractive in view of practical use, including the higher working voltage of the LiFe0.25 Mn0.5 Co0.25 PO4 cathode with respect to conventional LiFePO4, as well as the remarkable capacity and rate capability of Sn-Fe2 O3 -C and Sn-C anodes. The stable electrode/electrolyte interfaces, demonstrated by electrochemical impedance spectroscopy, along with proper mass balancing and anode pre-lithiation, allow stable galvanostatic cycling of the full cells. The two batteries, namely Sn-Fe2 O3 -C/LiFe0.25 Mn0.5 Co0.25 PO4 and Sn-C/LiFe0.25 Mn0.5 Co0.25 PO4, reversibly operate revealing promising electrochemical features in terms of delivered capacity, working voltage and stability, thus suggesting these electrodes combinations as suitable alternatives for an efficient energy storage.