All-Solid-State Lithium-Ion Microbatteries Using Silicon Nanofilm Anodes: High Performance and Memory Effect
CRAS, Frédéric Le
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
DUBOIS, Vincent
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
CRAS, Frédéric Le
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
DUBOIS, Vincent
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
PHAN, Viet-Phong
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
< Reduce
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
STMicroelectronics [Tours] [ST-TOURS]
Language
en
Article de revue
This item was published in
Advanced Energy Materials. 2015, vol. 5, n° 19, p. 1501061 (10 p.)
Wiley-VCH Verlag
English Abstract
All-solid-state thin film lithium batteries are promising devices to power the next generations of autonomous microsystems. Nevertheless, some industrial constraints such as the resistance to reflow soldering (260 °C) and ...Read more >
All-solid-state thin film lithium batteries are promising devices to power the next generations of autonomous microsystems. Nevertheless, some industrial constraints such as the resistance to reflow soldering (260 °C) and to short-circuiting necessitate the replacement of the lithium anode. In this study, a 2 V lithium-ion system based on amorphous silicon nanofilm anodes (50–200 nm thick), a LiPON electrolyte, and a new lithiated titanium oxysulfide cathode Li1.2TiO0.5S2.1 is prepared by sputtering. The determination of the electrochemical behavior of each active material and of whole systems with different configurations allows the highlighting of the particular behavior of the LixSi electrode and the understanding of its consequences on the performance of Li-ion cells. Lithium-ion microbatteries processed with industrial tools and embedded in microelectronic packages exhibit particularly high cycle life (−0.006% cycle−1), ultrafast charge (80% capacity in 1 min), and tolerate both short-circuiting and reflow soldering. Moreover, the perfect stability of the system allows the assignment of some modifications of the voltage curve and a slow and reversible capacity fade occurring in specific conditions, to the formation of Li15Si4 and to the expression of a “memory effect.” These new findings will help to optimize the design of future Li-ion systems using nanosized silicon anodes.Read less <
English Keywords
all-solid-state batteries
Li15Si4
Li-ion batteries
silicon
thin film
Origin
Hal imported