CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Huali Liang,Shuai Yuan,Liyi Shi,Yin Zhao,Zhuyi Wang,Jiefang Zhu
Ni-rich layered oxides are potential cathode candidate’s materials for Li-ion batteries due to their low cost and high energy density. However, it is difficult to reproducibly prepare uniformly distributed element and well-controlled morphology of Ni-rich layered oxide particles. This study develops a continuous microfluidic reaction process to synthesize spherical carbonate precursors (Ni 0.6 Mn 0.2 Co 0.2 CO 3 ). The as-synthesized LiNi 0.6 Co 0.2 Mn 0.2 O 2 materials exhibit well-defined microsphere morphology, uniform particles size distribution, better thermal stability and homogeneous transition metal distribution, due to the excellent mixing, well mass and heat transfer rate during the microfluidic reaction. Moreover, the as-prepared LiNi 0.6 Co 0.2 Mn 0.2 O 2 materials achieve higher initial capacity, excellent electrochemical reversibility and capacity retention than that of the samples prepared by traditional co-precipitation. Therefore, our results demonstrate that microfluidic reaction is a simple and effective synthesis technology for preparing Ni-rich layered cathode.
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Xin Jiang,Li Qin,Haifeng Yu,Ling Chen,Hao Jiang,Chunzhong Li
Single-crystalline LiNi0.6Mn0.2Co0.2O2 cathodes (NMC622) synthesized by all-dry solid-phase synthesis (ADSPS) are promising candidates for high-voltage Li-ion batteries (LIBs) in virtue of their ecofriendly and cost-effective merits. However, serious Li/O loss at high sintering temperatures results in their structural and interfacial instabilities. Herein, a strontium/tantalum (Sr/Ta) codoped and lithium-borate (LBO) coated single-crystalline LiNi0.6Mn0.2Co0.2O2 (NMC622) with a superior layered structure is successfully prepared by ADSPS for the first time. Sr ions can reduce the sintering temperature by promoting grain-boundary fusion and particle growth, while Ta ions with a high Ta–O bond energy (839 kJ mol–1) further alleviate oxygen loss to decrease Li/Ni mixing and oxygen vacancies. The LBO coating layer helps to remove surface residual alkali, enhancing interfacial stability and Li-ion transfer dynamics. Therefore, the resultant cathode displays a high capacity of 191.9 mAh g–1 at 0.1C with a superior capacity retention of 81.6% at 1C within 2.7–4.5 V after 2000 cycles in pouch-type full cells.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Applied Materials Today
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2023
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IF 8.3
Chaochao Wei,Shaoqing Chen,Chuang Yu,Ru Wang,Qiyue Luo,Shuai Chen,Zhongkai Wu,Chongxuan Liu,Shijie Cheng,Jia Xie
Sb-based lithium sulfide electrolytes are promising for all-solid-state lithium battery applications due to their ultrahigh Li-ion conductivity (10 −2 S/cm) which is even comparable to current liquid electrolytes. However, the poor electrochemical stability between this electrolyte and high voltage layered structure cathode makes it difficult to achieve excellent battery performances. Herein, Li 6.5 Sb 0.5 Ge 0.5 S 5 I electrolyte with ionic conductivity up to 10 m S/cm is successfully synthesized and the electrochemical failure mechanism of the corresponding battery using bare LiNi 0.6 Mn 0.2 Co 0.2 O 2 cathode and Li-In anode is revealed. Furthermore, Li 3 InCl 6 electrolyte is introduced both as an ionic additive in the cathode mixture and as an isolating layer to avoid side reactions. The designed configuration delivers a high discharge capacity of 162.7 mAh/g at 0.5C and sustains 74.5% of the capacity after 200 cycles at room temperature. Moreover, it also can reversibly cycle from -20 to 60 °C with superior battery performances. This work provides a general design strategy for utilizing highly conductive sulfide electrolytes with low stability in all-solid-state batteries.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
SCRIPTA MATERIALIA
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2023
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IF 6
Ziling Jiang,Chuang Yu,Shaoqing Chen,Chaochao Wei,Cong Liao,Zhongkai Wu,Shuai Chen,Shijie Cheng,Jia Xie
Lithium argyrodites electrolyte with high ionic conductivity and relatively lower cost show great potential as candidates for solid-state batteries. Further improvement of their conductivities can accelerate their applications. One of the means to significantly promote the conductivity of Li-ion is dual doping. Herein, Ag/Br dual-doping strategy is applied on Li 6 PS 5 Br (2.76 mS cm −1 ) to boast its conductivity to 6.15 mS cm −1 for Li 5.55 Ag 0.05 PS 4.6 Br 1.4 . The structural variations and chemical/electrochemical stability of the obtained electrolyte are carefully investigated. Li 3 InCl 6 electrolyte is introduced in the new battery configuration to mitigate the interfacial instability with LiNi 0.6 Mn 0.2 Co 0.2 O 2 active material enabling good electrochemical performances . The assembled battery delivers a discharge capacity of 160.8 mAh g −1 for the 1st cycle and maintains 85.9% of the initial value after 50 cycles at 0.5C. This modification strategy was proved effective for increasing the conductivity of sulfide electrolytes in this work.
研究领域:
材料科学
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电化学
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电池技术
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固态电解质
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DOI
高影响因子
ACS Nano
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2025
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IF 16
Liu Yang,Kai Cui,Lu Chen,Yanxin Jiang,Hongji Pan,Chunlei Song,Junjie Chen,Anjun Hu,Tianshuai Wang,Jianping Long,Yiju Li
As a protic impurity, water can severely degrade battery life and pose safety risks. Lowering the H2O content in the electrolyte is essential, but it often requires energy-intensive drying technologies. Here, we develop a multifunctional interlayer utilizing dehydrated sepiolite on a commercial polypropylene separator (Sep@PP) to address water-induced challenges in lithium batteries. Its open channel and rich active sites (Si–O–Si, Mg–OH2, and Mg–OH groups) make it effectively absorb harmful impurities (e.g., H2O, HF, and transition metal ions), thereby preventing electrolyte decomposition, stabilizing the electrode interface, and further enhancing cycling stability. Moreover, the inherent thermal stability of dehydrated sepiolite endows the separator with exceptional heat resistance, mitigating thermal runaway risks and significantly enhancing overall battery safety. As a result, the LiNi0.5Mn1.5O4 (LNMO)//Li cell assembled with the Sep@PP separator exhibits excellent cycling stability, retaining 84.1% of its capacity over 500 cycles. Even when cycled in an electrolyte containing ultrahigh water content (1200 ppm), the LNMO//Li cell still maintains 81.7% of its capacity over 500 cycles, demonstrating its strong tolerance to moisture. Furthermore, the LiNi0.6Mn0.2Co0.2O2 (NCM622)//Li cell paired with the Sep@PP separator shows superior stability and maintains 72.3% of the initial capacity after 200 cycles, even at 55 °C. These findings underscore that leveraging the unique structure of dehydrated sepiolite presents a novel approach to mitigating water hazards in the modern battery industry.
研究领域:
材料科学
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电化学
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储能技术
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电池技术
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纳米技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）