State Key Laboratory of Coal Mine Disaster Dynamics and Control

Cyclic Nanoindentation of Clay Minerals: Micromechanical Insights Into Caprock Integrity for Subsurface Energy Storage

Abstract Clay minerals are key constituents of subsurface caprocks and play a critical role in the long-term containment performance of underground energy storage systems. However, their cyclic mechanical response remains insufficiently understood, despite repeated pressure fluct...

Integrated adsorption–membrane process for lithium recovery from shale gas flowback fluid

Shale gas fracturing flowback fluid represents a promising unconventional lithium resource with concentrations reaching industrial grades, while simultaneously presenting significant wastewater treatment challenges. This study systematically investigates the complete research cha...

Research progress on green recycling technologies for lithium-ion batteries based on molten salt methods

The rapid increase in spent lithium-ion batteries (LIBs) has created an urgent demand for recycling technologies that can achieve efficient resource recovery, material regeneration, and reduced environmental impacts. Molten salt methods have attracted increasing attention because...

Influence of supercritical CO2-water soaking on fracture toughness of shale: Implications for shale gas recovery and CO2 sequestration

The fracture toughness of shale influences fracture network formation and CO 2 storage stability in shale reservoirs. To investigate this effect, semi-circular bending (SCB) tests and measurements of surface energy, fracture surface roughness, and mineral compositions were conduc...