An Integrated Device of a Lithium-Ion Battery Combined with Silicon Solar Cells

Hyeonsu Lim, Dan Na, Cheul-Ro Lee, Hyung-Kee Seo, O-Hyeon Kwon, Jae-Kwang Kim and Inseok Seo
Additional contact information
Hyeonsu Lim: School of Advanced Materials Engineering, Research Center for Advanced Materials Development (RCAMD), Jeonbuk National University, Baekje-daero 567, Jeonju 54896, Korea
Dan Na: School of Advanced Materials Engineering, Research Center for Advanced Materials Development (RCAMD), Jeonbuk National University, Baekje-daero 567, Jeonju 54896, Korea
Cheul-Ro Lee: School of Advanced Materials Engineering, Research Center for Advanced Materials Development (RCAMD), Jeonbuk National University, Baekje-daero 567, Jeonju 54896, Korea
Hyung-Kee Seo: Future Energy Convergence Core Center, School of Chemical Engineering, Jeonbuk National University, Baekje-daero 567, Jeonju 54896, Korea
O-Hyeon Kwon: Department of Solar & Energy Engineering, Cheongju University, Cheongju 360-764, Korea
Jae-Kwang Kim: Department of Solar & Energy Engineering, Cheongju University, Cheongju 360-764, Korea
Inseok Seo: School of Advanced Materials Engineering, Research Center for Advanced Materials Development (RCAMD), Jeonbuk National University, Baekje-daero 567, Jeonju 54896, Korea

Energies, 2021, vol. 14, issue 19, 1-11

Abstract: This study reports an integrated device of a lithium-ion battery (LIB) connected with Si solar cells. A Li(Ni 0.65 Co 0.15 Mn 0.20 )O 2 (NCM) cathode and a graphite (G) anode were used to fabricate the lithium-ion battery (LIB). The surface and shape morphologies of NCM and graphite powder were characterized by field emission scanning electron microscopy (FE-SEM). The structural properties of NCM and graphite powder were determined by X-ray diffraction (XRD) analysis. XRD patterns of powders were well matched with those of JCPDS data. To investigate the electrochemical characteristics of NCM and graphite, cycling tests were performed after assembling the NCM-Li, the G-Li half-cell, and the NCM-G full-cell. The discharge capacity of the NCM cathode at 0.1C was 189.82 mAh/g ?1 . The NCM-graphite full-cell showed 98.25% cycle retention at 1C after 50 cycles. To obtain enough charging voltage for the LIB connected with solar cells in an integrated device, eight single Si solar cells were connected in a series. The short-circuit photocurrent density for Si solar cells was 4.124 mA/cm 2 . The fill factor and the open circuit voltage were 0.78 and 4.5 V, respectively. These Si solar cells showed a power conversion efficiency of 14.45%. The power conversion andstorage efficiency of the integrated device of the NCM battery and Si solar cells was 7.74%. Charging of the integrated device could be as effective as charging with a battery cycler.

Keywords: Li(Ni x Co y Mn z )O 2; graphite; lithium-ion battery; silicon solar cell; integrated device (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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