Robust dual-cross-linked networks enable stable silicon anodes.

The simultaneous attainment of long cycle life and high energy in Si anodes remains challenging. Herein, we introduce the concept of primary building units as organizing units to construct durable and conductive electrode architectures, which helps to facilitate the coalescence of Si nanoparticles with conductive pathways and prevent nanoparticle aggregation.

Localized Ligands Assist Ultrafast Multivalent-Cation Intercalation Pseudocapacitance.

Rechargeable batteries based on multivalent cation (Mv , n>1) carriers are considered potentially low-cost alternatives to lithium-ion batteries. However, the high charge-density Mv carriers generally lead to sluggish kinetics and poor structural stability in cathode materials. Herein, we report an Mv storage via intercalation pseudocapacitance mechanism in a 2D bivalve-like organic framework featured with localized ligands.

Ion Co-storage in Porous Organic Frameworks through On-site Coulomb Interactions for High Energy and Power Density Batteries.

Fast and continuous ion insertion is blocked in the common electrodes operating with widely accepted single-ion storage mechanism, primarily due to Coulomb repulsion between the same ions. It results in an irreconcilable conflict between capacity and rate performance. Herein, we designed a porous organic framework with novel multiple-ion co-storage modes, including PF /Li , OTF /Mg , and OTF /Zn co-storage.

Enhancing Co/CoVO Li-ion battery anode performances via 2D-2D heterostructure engineering.

High-capacity CoVO has become a potential anode material for lithium-ion batteries (LIBs), benefiting from its lower output voltage during cycling than other cobalt vanadates. However, the application of this new conversion-type electrode is still hampered by its inherent large volume variation and poor kinetics. Here, a 2D-2D heterostructure building strategy has been developed to enhance the electrode performance of CoVO through construction of Co/CoVO nanocomposites converted from the in situ phase separation of CoVO·3.

Metal-organic framework derived amorphous VO coated FeO/C hierarchical nanospindle as anode material for superior lithium-ion batteries.

Lithium-ion batteries (LIBs) are widely regarded as a promising electrochemical energy storage device, due to their high energy density and good cycling stability. To date, the development of anode materials for LIBs is still confronted with many serious problems, and much effort is required for constructing more ideal anode materials. Herein, starting with metal-organic frameworks (MOFs), an amorphous VO coated FeO/C hierarchical nanospindle has been successfully synthesized.

Engineering Mesoporous Single Crystals Co-Doped FeO for High-Performance Lithium Ion Batteries.

To achieve high-efficiency lithium ion batteries (LIBs), an effective active electrode material is vital. For the first time, mesoporous single crystals cobalt-doped FeO (MSCs Co-FeO) is synthesized using formamide as a pore forming agent, through a solvothermal process followed by calcination. Compared with mesoporous single crystals FeO (MSCs FeO) and cobalt-doped FeO (Co-FeO), MSCs Co-FeO exhibits a significantly improved electrochemical performance with high reversible capacity, excellent rate capability, and cycling life as anode materials for LIBs.