Ball-Milling-Assisted N/O Codoping for Enhanced Sodium Storage Performance of Coconut-Shell-Derived Hard Carbon Anodes in Sodium-Ion Batteries.

Sodium-ion batteries (SIBs) are regarded as cost-effective alternatives or competitors to lithium-ion batteries for large-scale electric energy storage applications. However, their development has been hindered by the high cost of hard carbon (HC) anodes and poor electrochemical performance. To enhance the sodium storage capacity and rate performance of HC, this study accelerated the electrochemical performance of coconut-shell-derived HC anodes for SIBs through N/O codoping using ball milling and pyrolysis.

Improving the Cycle Stability of LiNiO through Al Doping and LiAlO Coating.

In this study, we addressed the poor cycling and rate performance of LiNiO, a material with ultrahigh nickel content considered a strong contender for high-energy-density lithium-ion battery cathodes. We introduced nano-AlO during the lithiation process to achieve dual modified material through bulk phase element doping and in situ LiAlO coating. Comparison revealed notable improvements in the modified materials.

Biochar-enhanced three-dimensional conductive network thick electrodes for efficient lithium extraction from salt lake brines with high Magnesia-lithium ratios.

Enhancing the kinetic performance of thick electrodes is essential for improving the efficiency of lithium extraction processes. Biochar, known for its affordability and unique three-dimensional (3D) structure, is utilized across various applications. In this study, we developed a biochar-based, 3D-conductive network thick electrode (∼20 mg cm) by in-situ deposition of LiFePO (LFP) onto watermelon peel biomass (WB).

Enhanced Cathode Performance: The Heterostructure Construction of LiCoO@CoO@LiLaZrTaO.

In this study, the heterostructure cathode material LiCoO@CoO@LiLaZrTaO was prepared by coating LiLaZrTaO on the surface of LiCoO through a one-step solid-phase synthesis. The morphology, structure, electrical state, and elemental contents of both pristine and modified materials were assessed through a range of characterization techniques. Theoretical calculations revealed that the LCO@LLZTO material possessed a reduced diffusion barrier compared to LiCoO, thereby facilitating the movement of Li ions.

Understanding Electrochemical Performance Enhancement with Quaternary NCMA Cathode Materials.

Ni-rich cathode materials show promise for use in lithium-ion batteries. However, a significant obstacle to their widespread adoption is the structural damage caused by microcracks. This research paper presents the synthesis of Ni-rich cathode materials, including LiNiCoMnO (referred to as NCM) and Li(NiCoMn)AlO (referred to as NCMA), achieved through the high-temperature solid-phase method.

Nano ZrO Modification for Enhancement of the Electrochemical Performance of Li-Rich Manganese-Based Cathodic Materials.

In this work, high-temperature solid-phase techniques have been used to produce both natural and nano ZrO-modified Li-rich manganese-based cathodic materials. Several characterizations were carried out to evaluate the morphology, structure, electrical state, and elemental content of unmodified as well as nano-modified LiNiCoMnO. The results of electrochemical tests showed that cathodic materials modified with 0.

New Insight into the Working Mechanism of Lithium-Sulfur Batteries under a Wide Temperature Range.

Sweet potato-derived carbon with a unique solid core/porous layer core/shell structure is used as a conductive substrate for gradually immobilizing sulfur to construct a cathode for Li-S batteries. The first discharge specific capacity of the Li-S batteries with the C-10K@2S composite cathode at 0.1C is around 1645 mAh g, which is very close to the theoretical specific capacity of active sulfur.

Melt-diffusion and ion-exchange methods: self-triggered O-rich groups on the surface of acetylene black using S-EDA solution to boost its sulfur content for lithium-sulfur batteries.

Only a few studies have described the use of H-attacking S-EDA in nucleophilic substitution reactions to bind frameworks and sulfur in cathode materials, which is also known as the ion-exchange method. The pros and cons of this method are still unclear in relation to lithium-sulfur battery applications. Here, the influences of two synthetic routes, a melt-diffusion method and H reacting with S-EDA via nucleophilic substitution, on the morphologies and electrochemical properties of cathode materials are discussed in detail based on in situ XRD and other advanced technologies.

Enhanced Cathode Performance: Mixed AlO and LiAlO Coating of LiNiCoMnO.

Li-rich, manganese-based cathode materials are attractive candidates for Li-ion batteries because of their excellent capacity, but poor rate and cycle performance have limited their commercial applications. Herein, Li-rich, manganese-based cathode materials were modified with aluminum isopropoxide as an aluminum source modifier using a sol-gel technique followed by a wet chemical method. To investigate the structure, morphology, electronic state, and elemental composition of both pristine- and surface-modified LiNiCoMnO, various characterizations were performed.

Synthesis of a fine LiNiCoAlO cathode material for lithium-ion batteries a solvothermal route and its improved high-temperature cyclic performance.

Nickel-Cobalt-Aluminum (NCA) cathode materials for lithium-ion batteries (LIBs) are conventionally synthesized by chemical co-precipitation. However, the co-precipitation of Ni, Co, and Al is difficult to control because the three ions have different solubility product constants. This study proposes a new synthetic route of NCA, which allows fabrication of fine and well-constructed NCA cathode materials by a high temperature solid-state reaction assisted by a fast solvothermal process.

Electrostatic force spectroscopy revealing the degree of reduction of individual graphene oxide sheets.

Electrostatic force spectroscopy (EFS) is a method for monitoring the electrostatic force microscopy (EFM) phase with high resolution as a function of the electrical direct current bias applied either to the probe or sample. Based on the dielectric constant difference of graphene oxide (GO) sheets (reduced using various methods), EFS can be used to characterize the degree of reduction of uniformly reduced one-atom-thick GO sheets at the nanoscale. In this paper, using thermally or chemically reduced individual GO sheets on mica substrates as examples, we characterize their degree of reduction at the nanoscale using EFS.

Enhanced thermal conductivity in a hydrated salt PCM system with reduced graphene oxide aqueous dispersion.

The phase change enthalpy, thermal conductivity, thermal stability and thermal reliability of a novel reduced graphene oxide (r-GO) containing phase change material (PCM) r-GO/CaCl·6HO were investigated. The material was made by the aqueous dispersion of r-GO and calcium chloride dihydrate (CaCl·2HO) according to the mass ratio of CaCl and crystal water in CaCl·6HO. The thermal conductivity of the phase change material increased by ∼80% when using ∼0.