In situ self-assembly assisted synthesis of N-doped mesoporous hierarchical carbon aerogels-wrapped Li_(2)ZnTi_(3)O_(8) composite for highrate lithium ion batteries

Reinforcing electronic and ionic conductivity is very important to realize the high-rate Li_(2)ZnTi_(3)O_(8)(LZTO)anode for Lithium-ion batteries(LIBs).Here,we reported a synthetic strategy toward in situ growth of homodispersed Li_(2)ZnTi_(3)O_(8)on ultralight 3D carbon aerogels(CAs)via facile heat treatment and activation process taking LiOH as activating agent.Such an optimized composite obtains a specific surface area of 154.427 m^(2) g^(-1) and a high pore volume.The strong interaction between the LZTO and N-doped CAs,a highly electrical conductivity and multidimensional ion transport channels of the hybrid result in a high capacity,outstanding high-rate performance and long cycle life.As a result,the NPC-LZTO electrode(NPC-LZTO-B)delivers a commendable reversible capacity at high-rate(e.g.162.4 mAh g^(-1) at 5 A g^(-1)(22 C)and 127.3 mAh g^(-1) at 10 A g^(-1))and durable long-term performance(capacity retention of 73% after 4500 cycles at 5 A g^(-1)).Moreover,the kinetic analysis confirms that the feature of pseudocapacitance boosts lithium-ion storage performance at high rate.Porous carbon aerogels frame constructed LZTO nanocomposite electrodes provide a facile way to design high durable LIBs anode.