A facile method for pre-preparing a LiF-coating layer is proposed. This method considerably improves the electrochemical performance of an anode (SiO _x ) and a cathode (LiNi _0.8 Co _0.1 Mn _0.1 O ₂ ).

A hierarchically porous crystalline MnO₂ anode was applied to a lithium ion battery and exhibited long cycling life and high rate performance.

The recovery of massive kerf loss silicon waste into silicon anodes is an attractive approach to efficiently utilizing resources and protect the environment. Tens-of-nanometers-scale-thickness Si waste particles enable the high feasibility of high-rate Li-ion storage, but continuous oxidation leads to a gradual loss of electrochemical activity. Understanding the relationship between this oxidation and Li-ion storage properties is key to efficiently recovering silicon wastes into silicon anodes. However, corresponding research is rare. Herein, a series of silicon waste samples with different oxidation states were synthesized and their Li-ion storage characters were investigated. By analyzing their Li-ion storage properties and kinetics, we found that oxidation has absolutely detrimental effects on Li-ion storage performance, which is different to previously reported results of nano-silicon materials. The 2.5 wt.% Si provides a substantial initial discharge capacity of 3519 mAh/g at 0.5 A/g. The capacity retention of 2.5 wt.% Si is almost 70% after 500 cycles at 1 A/g. However, the 35.8 wt.% Si presents a modest initial discharge capacity of merely 170 mAh/g. Additionally, oxidation leads the Li-ion storage kinetics to transform from Li-ion diffusion-controlled to charge transfer-controlled behaviors. For kerf loss silicon waste with an oxygen content over 35.8 wt.%, Li-ion storage capability is lost due to a high charge transfer resistance and a low Li-ion diffusion coefficient.

Relative positioning of functional groups in molecular additives and its impact on defect passivation in perovskite solar cells remains insufficiently understood. Here, we systematically investigate three diaminobenzenesulfonic acid (DABSA) isomers (2,4‐DABSA, 2,5‐DABSA, and 3,4‐DABSA) as model additives and reveal the critical role of the spatial arrangement between amino and sulfonic acid groups in enabling synergistic passivation. Among them, the ortho‐para‐substituted 2,4‐DABSA exhibits the strongest interaction with the perovskite precursor, inducing a distinct “fast nucleation followed by slow crystallization” kinetics. This dynamic control suppresses the formation of vacancies and grain boundaries by allowing ordered lattice arrangement, yielding 1.68 eV (FA₀.₇₇MA₀.₂₃)₀.₉₅Cs₀.₀₅Pb(I₀.₇₇Br₀.₂₃)₃ perovskite films, which exhibit a significantly reduced defect density. Notably, in‐situ photoluminescence measurements confirm that 2,4‐DABSA effectively suppresses light‐induced phase segregation under combined light and thermal stress (1‐sun at 65°C). Consequently, the 2,4‐DABSA‐modified device achieved a champion PCE of 23.48% and significantly enhanced operational stability. The unencapsulated devices retain 93.00%, 90.12%, and 80.23% of their initial efficiency after 1000 h of aging at 85°C/35% RH, 20°C/80% RH, and 85°C/80% RH, respectively. This work demonstrates that isomer selection adds a crucial dimension beyond functional group engineering, providing new insights for overcoming the stability bottlenecks in wide‐bandgap perovskite photovoltaics.

Electrochemical water splitting, a sustainable method for hydrogen production, faces the challenge of slow oxygen evolution reaction (OER) kinetics. Iridium oxide (IrO₂) is widely regarded as the most effective catalyst for OER due to its excellent properties. Compared to nanoparticles, IrO₂ thin films exhibit significant advantages in OER, including a uniform and stable catalytic interface and excellent mechanical strength. This paper reviews recent advancements in one-step deposition techniques for the preparation of IrO₂ thin films and their application in OER. Additionally, it analyzes the advantages and disadvantages of various methods and the latest research achievements, and briefly outlines the future trends and applications.

Energy saving and waste recycling are two importance for sustainability of the Earth. Radiative cooling is an effective technology to decrease cooling energy consumption. Realization of low-cost preparation of radiative cooling materials is a key for large-scale application but is still challenging. Meanwhile, growing prosperity of metallurgical industry leads to abundant silicon-containing solid wastes. In this work, for the first time, an upgrading strategy to transform siliconcontaining solid wastes into radiative cooling materials is proposed by using silicon slag as a representative raw material.To eliminate the SiC component which demonstrates strong sunlight absorption and highly chemical inertness, oxygen carriers (CeOx and SrOx)-assisted accelerated oxidation strategy is developed. Al element is introduced to modify the crystal structure of products to improve the radiative cooling performance. Blended with poly(4-methyl-pentene), a membrane with CeOx-assistant annealed product (A-SiS-Al/Ce) shows a radiative cooling power of 67.3 W m -2 . In contrast, a silicon slag membrane shows a sunlight heating power of 68.5 W m -2 due to the sunlight absorption from Si and SiC components. Energy consumption simulation indicates that the A-SiS-Al/Ce membrane can efficiently save cooling energy in wide regions with climatic parameters of temperate, hot summer with cold winter, and hot summer with warm winter.