ELECTROCHEMISTRY COMMUNICATIONS
·
2017
·
IF 4.396
Cailing Liu,Shaohua Luo,Hongbo Huang,Zhiyuan Wang,Aimin Hao,Yuchun Zhai,Zhaowen Wang
A novel layered ternary material K 0.67 Ni 0.17 Co 0.17 Mn 0.66 O 2 has been fabricated via a co-precipitation assisted solid-phase method and further evaluated as a cathode for potassium-ion batteries for the first time. Highly reversible K + intercalation/deintercalation is demonstrated in this material. It delivers a reversible capacity of 76.5 mAh/g with average voltage of 3.1 V and shows good cycling performance with capacity retention of 87% after 100 cycles at 20 mA/g. This work may give a new insight into developing cathode materials for potassium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 28
·2202006
·
IF 15.153
Shuangxu Liu,Jingzhao Chen,Yong Su,Chuanzuo Zheng,Dingding Zhu,Xuedong Zhang,Xiang Zhou,Ren Ouyang,Quanwei Huang,Yunfei He,Liang Tang,Shuai Li,Yuan Qiu,Gang Wang,Yongfu Tang,Liqiang Zhang,Qiao Huang,Jianyu Huang
Conversion-type cathodes such as metal fluorides, especially FeF 2 and FeF 3 , are potential candidates to replace intercalation cathodes for the next generation of lithium ion batteries. However, the application of iron fluorides is impeded by their poor electronic conductivity, iron/fluorine dissolution, and unstable cathode electrolyte interfaces (CEIs). A facile route to fabricate a mechanical strong electrode with hierarchical electron pathways for FeF 2 nanoparticles is reported here. The FeF 2 /Li cell demonstrates remarkable cycle performances with a capacity of 300 mAh g −1 after a record long 4500 cycles at 1C. Meanwhile, a record stable high area capacity of over 6 mAh cm −2 is achieved. Furthermore, ultra-high rate capabilities at 20C and 6C for electrodes with low and high mass loading, respectively, are attained. Advanced electron microscopy reveals the formation of stable CEIs. The results demonstrate that the construction of viable electronic connections and favorable CEIs are the key to boost the electrochemical performances of FeF 2 cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Can Liao,Longfei Han,Xiaowei Mu,Yulu Zhu,Na Wu,Jingyi Lu,Yonghui Zhao,Xingjun Li,Yuan Hu,Yongchun Kan,Lei Song
Safety and high energy density have long restricted the large-scale practical application of lithium metal batteries because of the unbridled growth of lithium dendrites and the rapid deteriorating cycle performance of the LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode. Herein, an additive of RbNO3 with multiple functions is proposed for dendrite-free NCM811 lithium metal batteries. Benefiting from the electrostatic shielding effect formed by Rb+ during the Li+ deposition process and the solvation effect of NO3– to regulate lithium deposition, a high Coulombic efficiency of 95.02% (compared with the low Coulombic efficiency of 89.37% in the blank electrolyte) is acquired in Li//Cu cells, and the uniform growth of the lithium metal deposition with a large strawberry-like morphology is achieved. Moreover, when a cathode of NCM811 matches with a lithium metal anode, an extraordinary capacity retention of 93.67% after 200 cycles with a high Coulombic efficiency of 99.7% in the electrolyte with the RbNO3 system (a capacity retention of 80.1% with a Coulombic efficiency of 98.0% for the blank electrolyte) is achieved at 1C. This work provides guidance for the development of high-efficiency additives with dual synergistic regulation effects of anions and cations for lithium metal batteries in the future.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 3
·030519
·
IF 3.9
Yi Shuai,Yilong Hu,Jin Lou,Xiongwei Gong,Mingxi Li,Zhixin Xu,Duoduo Deng,Fenglin Jiang,Ming Li
Sodium metal batteries have attracted extensive attention because of the high availability and energy density of Na; however, the practical application of these batteries is significantly plagued by dendritic growth. Aluminum metal has a unique advantage as a current collector for sodium metal anodes because of its low density and low cost. However, problems with dense aluminum oxide mean its application in sodium metal anodes has seldom been studied. In this study, aluminum foam was fluorinated by a facile method and compounded with sodium metal at high temperatures to prepare a sodiophilic aluminum foam@sodium electrode (NaHFAl). Because of the sodiophilic surface, NaHFAl achieves a non-dendritic deposition morphology and markedly reduced voltage hysteresis in symmetric cells for over 2200 h. The NaHFAl/carbonate electrolyte/sulfurized polyacrylonitrile (SPAN) cell exhibited excellent cycle performance, with a capacity retention of 68% after 800 cycles. Our work provides an easily scalable and cost-effective approach for the development of high-performance sodium metal anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Xiang Zhou,Dingding Zhu,Yong Su,Feixiang Wu,Xiaolei Ren,Xuedong Zhang,Xiangze Ou,Yaling Rao,Long Xie,Liang Tang,Jianyu Huang,Qiao Huang
Metal fluorides (MFs) are regarded as high-capacity conversion cathode materials for next-generation lithium-ion batteries with high energy density. However, these cathodes suffer from poor electronic conductivity, sluggish reaction kinetics, and deleterious cathode solid electrolyte interface (CEI) formation, which may cause rapid cell degradation upon cycling. Herein, a low temperature chemical vapor deposition (CVD) carbon coating technology is successfully achieved to coat MFs-FeF 2 with a thin amorphous carbon layer, which promotes the formation of a stable CEI with improved electronic and ionic transport property. Consequently, a discharge capacity higher than 450 mAh g −1 of the CVD coated FeF 2 is achieved with a capacity retention at about 75% after 2500 cycles in a saturated electrolyte. Moreover, an unprecedented cycling performance with the discharge capacity of 350 mAh g −1 after 500 cycles in a super diluted electrolyte is also achieved. Advanced cryo-electron microscopy reveals that the carbon coating significantly suppresses the undesirable CEI formation and promotes the formation of a thin CEI with excellent chemo-mechanical property. This work provides a feasible technology to stabilize the important interface on MFs and offers a new strategy to accelerate the commercial adoption of such cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2022
·Vol. 6
·期 5
·2101591
·
IF 15.367
Zhibo Song,Taohang Zhang,Lu Wang,Yan Zhao,Zikun Li,Meng Zhang,Ke Wang,Shida Xue,Jianjun Fang,Yuchen Ji,Feng Pan,Luyi Yang
Due to the severe volume variations during electrochemical processes, Si-based anodes suffer from poor cycling performance as the result of a collapsed conductive network. In this regard, a key strategy for fully exploiting the capacity potential of Si-based anodes is to construct a robust conductive network through rational binder design. In this work, a bio-inspired conductive binder (PFPQDA) is designed by introducing dopamine-functionalized fluorene structure units (DA) into a conductivity enhanced polyfluorene-typed copolymer (PFPQ) to enhance its mechanical properties. Through constructing hierarchical binding networks and resilient electron transportations within both nano-sized Si and micro-sized SiO x electrodes via interweaved interactions, the PFPQDA successfully suppresses the electrode expansion and maintains the integrity of conductive pathways. Consequently, owing to the favorable properties of PFPQDA, Si-based anodes exhibit improved cycling performance and rate capability with an areal capacity over 2.5 mAh cm –2 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Haiyan He,Kuo Cao,Shu Guo,Wenjiao Yao,Fei Chen,Jiemin dong,Chun-Hua Chen
Potassium-ion batteries (KIBs) have attracted more and more attention due to the abundant potassium resources and hence low cost of raw materials. Nevertheless, the performances of KIBs are still unsatisfactory for practical applications, mainly due to the lack of suitable cathode materials . In this work, we report for the first time a novel polyanionic compound K 1+δ VOPO 4 F as a potassium ion storage host. Thanks to its flexible while stable layered [VOPO 4 F] ∞ framework, as a KIB cathode material, it can provide a reversible capacity of about 101 mAh g −1 at a rate of 0.2 C with a 87% capacity retention after 250 cycles. The corresponding energy density of 363 Wh kg −1 is among the highest for K-ion storage. The working mechanism of the V 4+ /V 5+ redox reaction is determined by in-situ X-ray diffraction (XRD) and ex situ X-ray photoelectron spectra (XPS) analyses. Notably, it delivers a stable average capacity of 75 mAh g −1 for 700 cycles at 1 C with a capacity retention rate of 76%. This work presents that K 1+δ VOPO 4 F is a promising K + storage cathode material with merits of high energy density and long cyclability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yaqing Wei,Xuhao Liu,Runzhe Yao,Jiayao Qian,Yiyi Yin,De Li,Yong Chen
The alloying type materials have been proposed to be served as the alternative anode for lithium ion batteries (LIBs) owing to their much higher capacity than graphite. However, those elementary alloying substances still suffer large volume expansion, resulting in much Li-irreversibility of low initial coulombic efficiency (ICE<75%) and fast capacity fading. Herein, inspired by the high entropy concept, we extend the simple elements into the high entropy alloy (HEA) system by rational designing Li-active and high conductive components. Interestingly, one kind atomic disorder HEA composed of Ge-Sn-Sb-Si-Fe-Cu-P is successfully synthesized for the first time, which is surprisingly found delivered ultra-high reversibility (e.g. ICE=91%) for LIBs, combining with suitable plateau (∼0.5 V) and large discharge capacity (1448 mAh/g) as well. Furthermore, such formed HEA nanoparticles are greatly emdedded and encapsulated into carbon matrix to form a dragon-fruit-like HEA/C composite. Benefitted from above unique structural design, the HEA/C composite exhibits superior cyclability (>1600 h operation) and excellent rate performances (787 mAh/g and 63% retention at 2000 mA/g). This successful implement of high entropy concept into alloying type anode materials may open a new avenue to developing series high entropy alloys toward advanced energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Hongfang Jiu,Na Ren,Lixin Zhang,Qing Zhang,Yuying Gao,Yajuan Meng
The flower-like ZnMn 2 O 4 hollow microtubules were synthesized by a hydrothermal method and calcination method. The composition and morphology were characterized. The results showed that flower-like hollow microtubules were obtained through calcination treatment. The as-prepared ZnMn 2 O 4 electrochemical properties of flower-like hollow microtubules anode material for lithium-ion batteries were investigated. The first charge and discharge capacity was measured at 2152/1263 mA h g −1 when the current density at 400 mA g −1 . After 300 cycles, the capacity kept 515 mA h g −1 corresponding to the coulombic efficiency of 99%, which exhibited preferable cycling performance. The stability of the structure has been shown by rate performance, which had been tested under different current density. The results suggest a promising application of the ZnMn 2 O 4 as anode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Yuzhu Li,Yanshuang Meng,Xinglian Liu,Mingjun Xiao,Qianru Hu,Ruinian Li,Xinyou Ke,Guofeng Ren,Fuliang Zhu
Zinc ferrite (ZFO) is a promising anode material to replace the conventional graphite used in lithium ion batteries . However, the unstable structure and poor electrical conductivity of ZFO hinder its practical applications. In this work, carbon-coated ZFO nanospheres anchored on the reduced graphene oxide (C/ZFO/rGO) was synthesized by the solvothermal method and subsequent carbonization with an ionic liquid . In such a sandwich structure, ZFO nanospheres are double-protected by rGO and ionic liquid-derived carbon to maintain structural integrity and enhance electrical conductivity . It was found that the discharge/charge specific capacity of lithium ion batteries with C/ZFO/rGO is capable to maintain to be 963/952 mAh g −1 after 60 cycles at a current density of 0.3 A g −1 . Its discharge/charge specific capacity can maintain to be 183.3/180.2 mAh g −1 even after 2000 cycles at a current density of 8 A g −1 . The improved cycling performance and enhanced rate capability can be explained by the enhanced electrode kinetics and less degradation of structural integrity resulted from the double-protected sandwich structure.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Zhang Yong,Liu Xuan,Jiang Kexing,Feng Jiaqi,Liu Yujia
In this study, peanut shell was used as the raw material to synthesize activated biochar-MnO composite (PSBC-K) using KMnO 4 as an activating agent. The Q max of U(VI) by PSBC-K was 569.8 mg/g, which was 3.9 times the Q max of PSBC (147.3 mg/g). Besides, PSBC-K exhibited good selectivity for U(VI) and excellent cycling performance. The removal mechanisms of U(VI) for PSBC-K were primarily dominated by electrostatic interaction, coordination reaction, precipitation and ion exchange. Overall, this work presented a sustainable and straightforward method for creating a novel adsorbent for efficient U(VI) separation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2020
·Vol. 14
·期 1
·437-450
·
IF 30.289
Chuan-Wei Wang,Fu-Cheng Ren,Yao Zhou,Peng-Fei Yan,Xiao-Dong Zhou,Shao-Jian Zhang,Wen Liu,Wei-Dong Zhang,Ming-Hua Zou,Lei-Ying Zeng,Xia-Yin Yao,Ling Huang,Jun-Tao Li,Shi-Gang Sun
Sulfide-based all-solid-state lithium-ion batteries (ASSLIBs) are promising candidates in the next generation of energy storage technology; the voltage mismatch and the resulting side reactions at the interface between the cathode and the solid electrolyte, however, dramatically deteriorate their cycling performance. Herein, for the first time, we report that the chemical interaction between LiCoO2 (LCO) and TiO2 can be regulated by two additives, carbon and Li2CO3, which in situ form a continuous ultrathin pure-phase Li2CoTi3O8 (LCTO) layer with a stable 3D network of spinel structures, relatively low electronic conductivity (2.5 × 10−8 S cm−1) and high lithium diffusion coefficient (DLi+ = 8.22 × 10−7 cm2 s−1) on the surface of LCO. When assembled in ASSLIBs, such an LCTO layer functions as an interlayer between the LCO and the Li10GeP2S12 solid electrolyte (LGPS). As a consequence, the original interface LCO/LGPS is substituted by two new interfaces LCO/LCTO and LCTO/LGPS. DFT calculations indicate that, compared with the LCO/LGPS, the new interfaces are not only thermodynamically and electrochemically more compatible, but also have higher interfacial affinity. Therefore, the relevant ASSLIB exhibits evidently reduced interfacial impedance, and it also displays a high initial capacity of 140 mA h g−1 and a reversible discharge specific capacity of 116 mA h g−1 after 200 cycles at room temperature (0.1C). In comparison, the ASSLIB assembled without the LCTO interlayer delivers an initial capacity of 98 mA h g−1 and only retains 22.4% capacity after 100 cycles (0.1C). Even at a high cutoff voltage (4.5 V vs. Li/Li+), the ASSLIB with the LCTO interlayer could also exhibit a high initial capacity of 180 mA h g−1 and a remarkable retention of 132 mA h g−1 after 100 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）