Lithium-air batteries (LABs) are expected to provide a cell with a much higher capacity than ever attained before, but their prototype cells present a limited areal cell capacity of no more than 10 mAh cm-2, mainly due to the limitation of their air electrodes. Here, we demonstrate the use of flexible carbon nanotube (CNT) sheets as a promising air electrode for developing ultra-high capacity i...

Suppressing dendrite formation at lithium metal anodes during cycling is critical for the implementation of future lithium metal-based battery technology. Here we report that it can be achieved via the facile process of immersing the electrodes in ionic liquid electrolytes for a period of time before battery assembly. This creates a durable and lithium ion-permeable solid-electrolyte interphase...

Lithium ion batteries have been one of the major power supplies for small electronic devices since the last century. However, with the rapid advancement of electronics and the increasing demand for clean sustainable energy, newer lithium ion batteries with higher energy density, higher power density, and better cyclic stability are needed. In addition, newer generations of lithium ion batteries...

Lithium-ion batteries (LIBs) have played an increasingly dominant role in the current mobile society. Due to risky safety testing procedure, ultra-rigorous demands of facility, and complicated multiphysics nature issues, lack high-fidelity models describe behaviors lithium-ion upon abusive loading has significantly deferred further application LIBs. Herein, by assistance from ex-situ observatio...

A systematic approach to the analysis and design of a bi-directional Cûk converter for the cell voltage balancing control of a series-connected lithium-ion battery string is presented in this paper. The proposed individual cell equalizers (ICE) are designed to operate at discontinuous-capacitor-voltage mode (DCVM) to achieve the zero-voltage switching (ZVS) for reducing the switching loss of th...

Demand for lithium-ion battery cells (LIB) electromobility has risen sharply in recent years. In order to continue serve this growing market, large-scale production capacities require further expansion and the overall effectiveness of processes must be increased. Effectiveness can significantly optimized through innovative manufacturing technology by identifying scrap early chain. To enable the...

Lithium ion secondary batteries have a high voltage and a high energy density, as shown in Fig. 1, and are widely used in mobile devices such as cell phones, notebook PCs and PDAs. However, since lithium ion secondary batteries use a flammable organic liquid electrolyte, there is a risk of explosion or fire. Fire accidents can also occur due to contamination during production or from overchargi...

Energy Storage Systems (ESS) have an impressive track record for providing stability and efficient power management in power system. With recent technological advancements and the decline in costs, the use of battery for ESS is gradually becoming popular in the power industry. In particular, Lithium-ion Battery (LiB) is being used in various power grids around the world. In Jocheon, Jeju Island...

With the improvement of lithium-ion battery (LIB) technology, safety is becoming increasingly urgent topic for electric vehicles (BEVs). Short circuits, overcharging, high temperatures and overheating can cause thermal runaway reactions release flammable electrolyte which makes fire suppression very difficult. This study focuses on mechanism applications LIBs. In order to understand this, 10 ex...

OVERVIEW: As regards the expansion of “ubiquitous networks,” as the functionality of mobile information devices improves, the power source of such devices must also be improved. At present, to boost the performance of the lithium-ion battery commonly used today, new technical innovations regarding anode and cathode materials are necessary. In accordance with these needs, Hitachi is engaged in d...