In-situ graphene-coated carbon microsphere as high initial Coulombic efficiency anode for superior Na/K-ion full cell

2021 ◽  
pp. 133257
Author(s):  
Lei Yan ◽  
Jing Wang ◽  
Qingjuan Ren ◽  
Linlin Fan ◽  
Binhua Liu ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Full Cell ◽  
Carbon Microsphere ◽  
Coated Carbon ◽  
Initial Coulombic Efficiency

Boosting ultrahigh initial Coulombic efficiency of porous carbon anode for sodium-ion batteries via in-situ fabricating passivation interface

2021 ◽  
Author(s):  
Minghao Zhang ◽  
Yu Li ◽  
Feng Wu ◽  
Zhaohua Wang ◽  
Ying Bai ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Coulombic Efficiency ◽  
Sodium Ion ◽  
Carbon Anode ◽  
Porous Carbon Material ◽  
Sodium Ion Batteries ◽  
Storage Performance ◽  
Initial Coulombic Efficiency ◽  
Sodium Storage

Porous carbon material is regarded as one of the promising candidates of sodium-ion batteries (SIBs) due to its fast sodium storage performance. However, the inadequate initial Coulombic efficiency (ICE) resulting...

In-Situ Dual Growth of Graphitic Structures in Biomass Carbon as Potassium-ion Batteries Anode with High Initial Coulombic Efficiency

2021 ◽  
Author(s):  
Zheren Tang ◽  
Yan Wang ◽  
Zheng Zheng ◽  
Xingzhang Luo
Keyword(s):  
Carbon Material ◽  
Coulombic Efficiency ◽  
Potassium Ion ◽  
Biomass Carbon ◽  
Good Potential ◽  
Initial Coulombic Efficiency

Biomass carbon material has a good potential as an anode for potassium-ion batteries (KIBs). However, it suffers from a low initial Coulombic efficiency (ICE), which hinders its mass adoption. The...

High-coulombic-efficiency Si-based hybrid microspheres synthesized by the combination of graphene and IL-derived carbon

2015 ◽  
Vol 3 (42) ◽  
pp. 20935-20943 ◽  
Author(s):  
Sang-Hoon Park ◽  
Dongjoon Ahn ◽  
Young-Min Choi ◽  
Kwang Chul Roh ◽  
Kwang-Bum Kim
Keyword(s):  
Energy Efficiency ◽  
Coulombic Efficiency ◽  
Li Ion Batteries ◽  
Irreversible Capacity ◽  
Full Cell ◽  
Capacity Loss ◽  
Cell Capacity ◽  
Li Ion ◽  
Initial Coulombic Efficiency ◽  
High Coulombic Efficiency

The low initial coulombic efficiency of a Si-based anode can hinder the performance of practical full-cell Li-ion batteries (LIBs), as the irreversible capacity loss of the anode can diminish the reversible full-cell capacity and the energy efficiency.

scholarly journals Dendrite-Free and Stable Lithium Metal Battery Achieved by a Model of Stepwise Lithium Deposition and Stripping

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Tiancun Liu ◽  
Jinlong Wang ◽  
Yi Xu ◽  
Yifan Zhang ◽  
Yong Wang
Keyword(s):  
Reduction Method ◽  
Coulombic Efficiency ◽  
List Type ◽  
Lithium Metal ◽  
Metal Anode ◽  
In Situ Raman ◽  
Unique Model ◽  
Li Metal Anode ◽  
Pyridinic N

Highlights A facile method is adopted to obtain cucumber-like lithiophilic composite skeleton. Massive lithiophilic sites in cucumber-like lithiophilic composite skeleton can promote and guide uniform Li depositions. A unique model of stepwise Li deposition and stripping is determined. Abstract The uncontrolled formation of lithium (Li) dendrites and the unnecessary consumption of electrolyte during the Li plating/stripping process have been major obstacles in developing safe and stable Li metal batteries. Herein, we report a cucumber-like lithiophilic composite skeleton (CLCS) fabricated through a facile oxidation-immersion-reduction method. The stepwise Li deposition and stripping, determined using in situ Raman spectra during the galvanostatic Li charging/discharging process, promote the formation of a dendrite-free Li metal anode. Furthermore, numerous pyridinic N, pyrrolic N, and CuxN sites with excellent lithiophilicity work synergistically to distribute Li ions and suppress the formation of Li dendrites. Owing to these advantages, cells based on CLCS exhibit a high Coulombic efficiency of 97.3% for 700 cycles and an improved lifespan of 2000 h for symmetric cells. The full cells assembled with LiFePO4 (LFP), SeS2 cathodes and CLCS@Li anodes demonstrate high capacities of 110.1 mAh g−1 after 600 cycles at 0.2 A g−1 in CLCS@Li|LFP and 491.8 mAh g−1 after 500 cycles at 1 A g−1 in CLCS@Li|SeS2. The unique design of CLCS may accelerate the application of Li metal anodes in commercial Li metal batteries.

A Universal Strategy toward the Precise Regulation of Initial Coulombic Efficiency of Li‐Rich Mn‐Based Cathode Materials

2021 ◽  
pp. 2103173
Author(s):  
Weibin Guo ◽  
Chenying Zhang ◽  
Yinggan Zhang ◽  
Liang Lin ◽  
Wei He ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Coulombic Efficiency ◽  
Initial Coulombic Efficiency
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