Recovering kinetic, transport, and thermodynamic parameters is a key task in the development of battery models. This task is complicated because of the lack of informative experimental data and because of the complexity of the associated partial differential equation models. We present a computational framework that combines a variety of techniques to investigate the effects that different sour...

Developing high-performance batteries relies on material breakthroughs. During the past few years, various in situ characterization tools have been developed and have become indispensible in studying and the eventual optimization of battery materials. However, soft X-ray spectroscopy, one of the most sensitive probes of electronic states, has been mainly limited to ex situ experiments for batte...

Solid ionic conductors are actively sought for their potential application in electrochemical devices, particularly lithium batteries. We have found high ionic conductivity for a large variety of salts dissolved in the highly polar medium based on the plastic-crystal form of succinonitrile (N[triple bond]C[bond]CH(2)[bond]CH(2)[bond]C[triple bond]N). Its high diffusivity, plasticity and solvati...

A prototype miniature array of polymer membrane and solid state ion selective electrodes was developed for the purpose of performing an in-situ analysis of the soluble ionic species in Martian regolith (soil). The array contains a total of 27 electrodes for Kþ, Naþ, Ca2þ, Mg2þ, NH4 , Ba 2þ, NO 3 , Cl , and Liþ, each in triplicate. Barium electrodes were used to indirectly monitor sulfate throug...

The studies of rubber-polymer blends as solid polymer electrolyte for electrochemical devices application have been investigated. The electrolyte films were prepared by solution casting technique. The effect of poly(methyl methacrylate) (PMMA) and lithium tetrafluoroborate (LiBF4), salt concentration on chemical interaction, ionic conductivity, structure and morphology of 49% poly(methyl methac...

A flexible and wearable aqueous symmetrical lithium-ion battery is developed using a single LiVPO4 F material as both cathode and anode in a "water-in-salt" gel polymer electrolyte. The symmetric lithium-ion chemistry exhibits high energy and power density and long cycle life, due to the formation of a robust solid electrolyte interphase consisting of Li2 CO3 -LiF, which enables fast Li-ion tra...

An effective multisource energy harvesting system is presented as power supply for wireless sensor nodes (WSNs). The advanced system contains not only an expandable power management module including control of the charging and discharging process of the lithium polymer battery but also an energy harvesting system using the maximum power point tracking (MPPT) circuit with analog driving scheme f...

To improve the energy density of lithium-ion batteries, development advanced electrolytes with enhanced transport properties is highly important. Here, we show that by confining conventional electrolyte (1 M LiPF6 in EC-DEC) a microporous polymer network, cation transference number increases to 0.79 while maintaining an ionic conductivity on order 10−3 S cm−1. By comparison, non-porous, condens...

A novel sulfur/graphene nanosheet (S/GNS) composite was prepared via a simple ball milling of sulfur with commercial multi-layer graphene nanosheet, followed by a heat treatment. High-resolution transmission and scanning electronic microscopy observations showed the formation of irregularly interlaced nanosheet-like structure consisting of graphene with uniform sulfur coating on its surface. Th...